Power the RTMotion MK3.1 Receiver from the 12V port on the REDVOLT XL module, RED BACKPACK QUICKPLATE or ARRI Alexa. – Hirose to LM 0B – 60cm Length Compatible with; – ARRI Alexa – output is 12V, 2.2 A – RED BACKPACK QUICKPLATE – output is 12V, 3.8 A – REDVOLT XL Module – output is 12V, 3.8 A