The HFP-30 is powered by a user provided 4.8VDC to 7.4VDC battery pack plugged into the Batt/RX slot. Optionally, a receiver with the correct adapter can power the unit.

Note: Make sure the battery voltage corresponds to the servos being used. Do not use a 7.4V battery with a servo designed for 6V and under, or damage may occur to the servo.