FS-SR8 RC Receiver: Specification:Brand: FlySkyModel: FS-SR8Channels: 8Model Type: Fixed wing, Deltas-wing, Glider, Helicopter, Multicopter, Car, Engineering vehicle, Robot, BoatRF: 2.4GHzRF Standard: ANTInput Power: 3.5-9V/DCDimensions: 44.8*26.6*11.3mmWeight: 10gCertification; CE, FCC ID: N4ZSR800ID: FS-SR8-Receiver The Package Includes: 1pc FS-SR8 RC Receiver / 1pc FS-SR12 RC Receiver: FS-SR12 is a receiver in compliance with the ANT protocol, supporting the output of 12 PWM channels signals. It has two antennas, supporting two-way transmission and transfer-back function. Featuring the compact design, FS SR12 can be adapted for a variety of models. Specification:Brand: FlySkyProduct Name: FS-SR12 Compatible Transmitters: Adapts transmitters with ANT protocol, such as FS-ST8 Compatible Models: Fixed-wing aircraft, helicopters, gliders, delta-wing airplanes, multicopters, engineering vehicles, boats, robots or cars. PWM Channels: 12 RF: 2.4GHz ISM Maximum Power: < 20dBm (e.i.r.p.) (EU) 2.4G Protocol: ANT Resolution: 4096 Antenna: Two antennas Distance: > 1500m (Air distance without interference) Input Power: 3.5~9V/DC Working Current: 70mA/5V Data Output: PWM/PPM/i-BUS/S.BUS Online Update: Yes Temperature Range: -10 ~ +60Humidity Range: 20% ~ 95% Dimensions: 44.8*32*11.3mm Weight: 13g Certifications: CE, FCC ID: 2A2UNSR1200 The Package Includes: 1pc FS-SR12 RC Receiver If you have any questions or are not sure whether it is the correct item you want, pls feel free to contact me before purchasing.