2 AFHDS (the second generation of automatic frequency hopping number system) the system is designed for model enthusiasts independent research and development of a digital wireless system. Model for product research and development it has strong anti-interference ability passive and active and the use of low power consumption and high receiving sensitivity is one of the best systems on the current market. Multiple frequency point jump frequently work: working band is 2.4G-2.4835GHz 160 frequency points. Each system using a different 16 frequency point and frequency hopping rules in 160. RL - T7A transmitter parameters: channel: 7. Suitable for fixed wing and helicopters cars boats support 4 6 axis aircraft. Transmitting power: <20dbm. Modulation mode: GFSK. System modules: AFHDS. Data resolution: 1024. Low voltage alarm function:(8.6 V). Analog interface: yes. Power supply standard: 12V DC (1.5V * 8). Weight: 595g. Antenna length: 26mm. Installation dimensions: 154 * 127 * 270 mm. Color: black. Safety certification: CE FCC. RL-R7A receiver parameters: 7 channels. Suitable for fixed wing and helicopters cars boats support 4 6 axis aircraft. Receiving sensitivity: - 95dbm. Modulation mode: GFSK. System modules: 2AFHDS. Data resolution: 1024. Out of control protection function: yes. For code interface: CH7 (BIND). From electric power supply interface: (CH3 BEC in electricity 5-6V). Power standard: 5~6 VDC (1.5 V * 4). Weight: 5g. Antenna length: 26mm. Manual: http://m5.img.dxcdn.com/CDDriver/CD/sku.297423.pdf