Vello FreeWave Captain Wireless TTL Receiver for Canon E-TTL or E-TTL II Cameras Temperature & Humidity Sensors This little guy is super

This little guy is super small

lots of jumper wires and a hardware programmer

These buttons are rated up to 50mA

Additionally

Vello FreeWave Captain Wireless TTL Receiver for Canon E-TTL or E-TTL II Cameras Temperature & Humidity Sensors This little guy is super2. 4GHz Reduced Interference Frequency 4 Channels Range: up to 300' Flash Sync up to 1 8,000 Sec. LED Indicators Studio Flash Cable and Monoplug Adapter The FreeWave Captain Wireless TTL Receiver for Canon E TTL or E TTL II from Vello is part of a multi purpose 2. 4 GHz, 4 channel digital TTL radio system that gives wireless freedom from a PC cord plus the convenience of accurate exposures through wireless communication with your camera's E TTL or E