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Revision as of 13:23, 1 June 2022


We have identified a potentially hazardous issue with the PocketWizard® PowerMC2 receiver when used in combination with the Paul C. Buff Einstein™ E640 flash units, especially the CE/433 MHz version sold in Europe. You may have received a previous message from Paul C. Buff, Inc. regarding this issue.

In rare circumstances, if the PowerMC2 is connected to the Einstein flash and the Einstein flash is connected to a power outlet, exposed metal components like the USB port or antenna spring on the PowerMC2 can become electrified, posing a potentially serious shock hazard. If the PowerMC2’s antenna cover is broken, removed, or in any way damaged, DISCONTINUE USE IMMEDIATELY and contact PocketWizard.

Customers in the United States may continue to safely use the Einstein flash and PowerMC2 with the power cord supplied by Paul C. Buff and a properly wired USA-style three-pronged power outlet (NEMA 5) or with the Vagabond battery pack. If a properly wired NEMA 5 power outlet is unavailable in your location, ALWAYS UNPLUG THE FLASH PRIOR TO HANDLING THE POWERMC2.

The issue has been corrected for all PowerMC2 units sold by PocketWizard’s authorized distributor in the USA after February 15, 2014. Customers owning affected units are advised to immediately contact PocketWizard Technical Support toll free at +1 877-393-0045 or via our inquiry page to arrange for the return of affected units for free servicing to reduce the risk of electrical shock. We urge you to contact us regardless of the condition of your PowerMC2. We greatly apologize for this inconvenience.

Affected units:

  • All units with the CE logo on the back, or any serial number beginning M2Cxxxxxxx are affected and correctable.
PowerMC2 Affected CE label.png

  • Units with the FCC logo on the back and with a serial number M2U192000 or lower are affected and correctable.
PowerMC2 Affected FCC label.png

Corrected units:

  • Units sold by PocketWizard’s authorized distributor in the USA after February 15th, 2014, or have serial number M2U194000 and higher, already have corrective safety features and warnings installed. Identifying features are “www.pwpatents.com” on the serial number sticker, and/or a yellow warning label.
PowerMC2 Corrected FCC label.png
PowerMC2 Warning Sticker.png

PowerMC2 Receiver with ControlTL® for Einstein­™ E640 Flash


The PowerMC2 Receiver Module enables remote power control of Einstein™ E640 flashes using PocketWizard ControlTL technology. With either a Raven by Fusion TLC or MiniTT1 Transmitter or a FlexTT5 / FlexTT6 Transceiver on your camera and a PowerMC2 plugged into your Einstein™ E640 flash, you can now adjust the flash power settings directly from the camera position. Add the AC3 ZoneController and you can control three different zones of lights in 1/3-stop increments with up to a six-stop range. Utilize PocketWizard’s unique features such as HyperSync and Optimized Rear Curtain Sync for maximum control of your lighting.

The PowerMC2 can also be used with any PocketWizard using Standard Channels as well, such as a Plus II or MultiMAX. You will need to adjust power levels on the Einstein itself when using these radios but if you are using Channels with Zones, you will be able to enable and disable the Zone from the transmitting radio. Please see the note below to learn how to choose the proper Channel on the Einstein.

Setting up your PowerMC2


1. Update the firmware in your PowerMC2 to the most current version.

NOTE: When connecting the PowerMC2 to the PocketWizard Utility, make sure to disconnect the PowerMC2 from any attached flash first.

Do not connect the PowerMC2 to USB while also connected to the Einstein E640 flash. Damage to your PowerMC2, Einstein, or computer's USB port could result.

2. Connect the PowerMC2 to your Einstein™ E640 Flash via the remote port, then power on the flash.

3. Select the Channel and Zone via the E640’s LCD. (see details below)

4. Disable the Einstein's optical flash (2 downward arrows).

4. Set up your transmitting radio and take pictures normally.

5. If using CTL Channels, adjust the camera’s Flash Exposure Compensation (FEC) or use the transmitting radio or AC3 to adjust power to your remote flash(es). See the Basic Power Control section for more information about FEC.

The Status LED blinks Green every few seconds to indicate normal operation. It will blink Red in sync with a trigger.

Momentarily pressing TEST will test trigger the flash.

Channels and Zones

Your PowerMC2 needs to be on the same Channel as your transmitter. Channels can be set via the Einstein’s built-in LCD. The PowerMC2 is capable of receiving on either ControlTL Channels (CTL) for use with ControlTL radios like the MiniTT1 and FlexTT5 or Standard Channels (CH) for triggering with the Plus II, MultiMAX, and Sekonic meters.

To set the channel, press the Einstein’s™ FUNCTION button until the Channel selection box is highlighted, and then change channels with the ADJUST buttons. Press the FUNCTION button again to specify a Zone.

PocketWizard Standard Channels CH01-CH32 (using a Plus or MultiMAX as the transmitter with Legacy firmware)

  • Available Standard Channels 1-32.
  • Power Control is not available with Standard Channels.
  • Channels 17-32 will also have Zones A, B, C, and D. Zones are not available for Channels 1-16.
  • You can enable or disable a Zone from a master controller if using Channels 17-32.

PocketWizard ControlTL Channels CTL01-CTL20 (Using PocketWizard MiniTT1/FlexTT5/FlxTT6 as the transmitter with Legacy firmware)

  • Available ControlTL Channels 1-20.
  • All Channels will have Zones A, B, and C.
  • Power Control is available with ControlTL Channels.

PocketWizard E Release Channels CTL01-CTL20 (using PocketWizards that have been upgraded to the E Release or the Raven as the transmitter)

  • Choose ControlTL Channels 1-20. E Channels 21-32 are not available at this time.
  • All Channels will have Zones A, B, and C.
  • Power Control is available with ControlTL Channels.

NOTE: if you are using the Raven as a transmitter and wish to use 4 Zones, you can combine the STD and CTL Channels. For Zones A, B, and C, use CTL Channels. For Zone D, set the Einstein to the same Channel number but use the CH setting. (for example, use CTL01 for A-C and CH01 for D) You will be able to adjust power to Zones A-C and you can set the power levels on Zone D on the flash itself.

Your PowerMC2 needs to be on the same Channel as your transmitter. Channels can be set via the Einstein’s built-in LCD. The PowerMC2 is capable of receiving on either ControlTL Channels (CTL) for use with ControlTL radios like the MiniTT1 and FlexTT5 or Standard Channels (CH) for triggering with the Plus II, MultiMAX, and Sekonic meters.

PowerMC2 FAQ

Having trouble with your PowerMC2 or do you have questions? Check out our PowerMC2 FAQ page!

HyperSync and SyncView

HyperSync with PocketWizard Transmitters

Most studio strobes can only sync up to your camera's sync speed - about 1/200 or 1/250 for most current DSLR cameras. Our patent pending HyperSync® technology allows photographers to achieve faster flash sync speeds. Unlike HSS that uses a pulsing flash with lower power, HyperSync uses your flash's full power burst. That extra speed and light can be used to freeze action or cut ambient light - both of which can produce results never possible before. HyperSync works automatically with the PowerMC2. All you need is a MiniTT1, FlexTT5, or FlexTT6 on your camera to gain the benefits of HyperSync. While performance varies by the camera and flash equipment being used, HyperSync will get the maximum possible out of any configuration.

SyncView with the Raven by Fusion TLC

The Raven takes PocketWizard's HyperSync technology to a new level. With the push of a button, the SyncView screen displays a never-before-seen representation of flash intensity over the length of the shutter cycle. A built-in light meter captures the flash profile and reveals timing in relation to the opening and closing of the shutter curtains. To adjust flash timing, simply rotate the ring dial to optimize timing of your flash. This link illustrates how easy it is to push your shutter speeds to their limits.

Power Control

When using CTL Channels with the PowerMC2, you have the ability to adjust power to your remote flashes. This can be done globally by the camera's flash exposure compensation (FEC) or by a master controller like an AC3 ZoneController, a master flash, or the Raven.

Manual Power Control by Zones
Manual power control.jpg

If you are using the Raven or have a master controller on your transmitting MiniTT1, FlexTT5, or FlexTT6, you can adjust power to each remote Zone independently.

  • If you are using a Raven, simply activate the Zone and use the dial to adjust power.
  • Adjust the manual power settings of your remote Einstein flash directly from a AC3 ZoneController, or master flash mounted on your on-camera MiniTT1 or FlexTT5. You can independently control the power output of up to three remote groups of lights (you can have as many lights in each group as you want) from full power down to the lowest setting through the user interface on the back of the master flash or with the dials of the AC3 ZoneController.

Now you can work with total control with your remote lights, without leaving your shooting position.


With PowerTracking, you can pick the perfect light level and lock it in, then when you change any of your settings on your camera, the system adjusts for those settings - you don't need to change the flash power. Change your camera's exposure compensation to adjust the flash output, or make adjustments in aperture or ISO and the system balances your flash for proper exposure.

Note that Flash Exposure Compensation can also be dialed in on a per-flash basis, by changing the PowerMC2's settings in the Exposure Tab of the PocketWizard Utility.

Basic Power Control

With only a MiniTT1 or FlexTT5 on your camera, your camera’s FEC (Flash Exposure Compensation) control will adjust your flash power output level for all your PowerMC2-connected flashes as shown in the table below.

Camera FEC/EC
- or -
AC3 Power Dial in Manual
Einstein E640 Power Output
+3 1/1
+2.7 1/2 + 0.6
+2.3 1/2 + 0.3
+2 1/2
+1.7 1/4 + 0.6
+1.3 1/4 + 0.3
+1 1/4
+0.7 1/8 + 0.6
+0.3 1/8 + 0.6
0 1/8
-0.3 1/16 + 0.6
-0.7 1/16 + 0.3
-1 1/16
-1.3 1/32 + 0.6
-1.7 1/32 + 0.3
-2 1/32
-2.3 1/64 + 0.6
-2.7 1/64 + 0.3
-3 1/64


Frequency 340.00 - 354.00 US FCC/IC
433.42 - 434.42 MHz - CE
Channels 52 Channels over 26 Frequencies - US FCC/IC
35 Channels over 5 Frequencies - CE
Antenna 2.7" (6.9 cm) rubberized
Mounting Eight-pin remote socket
Zone Select Switch A-B-C Plus channel "D" if receiving on a MultiMAX channel.
Status Indicator LED: Green, Amber, Red Status indications
USB USB Compliant 2.0, Mini-B Connector, 5VDC regulated, 100mA, Pin 1 Positive, Pin 4 Ground


Operating Temperature Above -15° C (5° F) and below 50° C (120° F)
Storage Temperature Above -30° C (22° F) and below 85° C (185° F)
Construction high impact plastic, rubberized antenna, RoHS Compliant
Power Receives power from attached flash
Dimensions 4.66" (11.84 cm) long x 1.29" (3.27 cm) wide x .43" (1.09 cm) depth
Weight .77 ounces (21.83 grams)
Requirements Must be used in conjunction with a MiniTT1 or FlexTT5 on camera for power control capability.
May be paired with any PocketWizard transmitter or transceiver for simple triggering.