Yongnuo YN-622N i-TTL Wireless Flash Transceiver & TX Controller Kit for Nikon Integrated Circuits (ICs) col-offset-11{margin-left:45

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3V version

SparkFun carries two inverters

and you can still get to the I/O pins

We now use a SMD 6-pin header on the bottom

Yongnuo YN-622N i-TTL Wireless Flash Transceiver & TX Controller Kit for Nikon Integrated Circuits (ICs) col-offset-11{margin-left:45Compatible with Nikon i TTL Frequency: 2. 4 GHz Range: 328' TTL, Manual, and Multi Flash Modes 7 Channels, 3 Groups Transceiver with Hot Shoe & PC Sync Port LCD Screen, AF Assist Beam High Speed and 1st and 2nd Curtain Sync USB Port for Firmware Updates Each Device Runs on 2 AA Batteries Get started with advanced wireless flash control by picking up this YN 622N i TTL Wireless Flash Transceiver & TX Controller Kit from Yongnuo , which bundles together