The super small and lightweight R21065GF 2.4GHz 6-Channel Micro Receiver from Futaba gives the option of High Speed mode with digital servos and fail safe on all channels. It can handle high voltage ranges (4.8-7.4V) and is compatible with all Futaba FHSS/S-FHSS transmitters (not compatible with FASST systems).
Specifications:
Size: 1.50 x .85 x .40 in (38 x 21 x 10 mm)
Weight with Case: 0.14 oz (4 g)
Antenna Length: 0.5 in
Battery Required: 4.8 - 7.4V
This is the Futaba R2106GF 2.4GHz FHSS 6-Channel Micro Receiver. Short range for indoor and park fliers.