Original RadioLink AT10 II 2.4Ghz 10CH RC Transmitter with R10DII Receiver PRM-01 Voltage Return Module Battery for RC Quadcopter Technical Parameter: 1.Frequency: 2.4GHz ISM band (2400MHz~2485MHz); 2.Modulation mode: QSPK; 3.Channel bandwidth: 5.0MHz; 4.Spread spectrum: DSSS; 5.Adjacent channel rejection: >38dBM; 6.Transmitter power: <100mW(PCB testing);<20dBm(3 meter air testing); 7.Operating Voltage: 8.6~15V; 8.Operating Current: <95mA; 9.Control distance: 800 meters ground; 10.Channel: 10 Channel,8~10 channel are customizable; 11.Compatible model: Include all 120 degree and 90 degree swashplate helicopter,all fix wing and glider,five flying model; 12.Simulator model: under the simulator Specifications: Package size: 33 * 26 * 12cm / 13 * 10.2 * 4.7in Package weight: 1276g / 2.8lb Package list: 1 * RadioLink AT10II 10CH Transimitter (Mode 2) 1 * R10DII 10Ch Receiver 1 * PRM-01 Voltage Return Module 1 * 4Pin Connector 1 * English Manual