Item model number: -SR8 Adaptive transmitter: -ST8 (for transmitters with ANT protocol) Adaptive model: RC Helicopters, RC gliders, RC -wing aircraft, RC multicopter, RC construction vehicles, RC robots, RC cars or boats, etc. Number of channels: 8CH Maximum power: Less than 20dBm (e.i.r.p.) (EU) RF: 2.4GHz ISM 2.4GHz protocol: ANT Distance: 1000 meters (air distance without interference). Antenna type: Two Antennas Input power: 3.5 - 9V/DC Data output: PWM/PPM/ich-BUS/S.BUS Online update: Yes Temperature range: -10 - +60 Humidity range: 20% - 95% Colour:As Shown Material:PC+Plastic Package Contents: 1 x Mini Receiver(Due to different product batches, the appearance , which does not affect the use) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.