A8S mini receiver uses the AFHDS 2A(Aotumatic Frequescy Hopping Digital System) protocol,supports standart PPM output and has i-BUS support for up to 18 channels Compatible Transmitter: FS-i4,FS-i6, FS-i6S,FS-i6X,FS-i10, FS-GT2E,FS-GT2G,FS-GT2F rc transmitter No ground interference ( Transmitting and receiving 1 m from the ground): 300m Channels: PPM 8CH, i-BUS 18CH. DSC port: PPM/i-BUS/S.BUS Mini size, light weight. Item Name:FS-A8S Receiver Channels: PPM 8CH, i-BUS 18CH Model type: Multi-rotor Frequency range: 2.408-2.475GHz Band width: 500KHz Band number: 135 RX Sensitivity: -92 dBm 2.4GHz system: AFHDS 2A Modulation type: GFSK DSC port: PPM/i-BUS/S.BUS Transfer method: FHSS Data output: 1.5mm x 3 Pin PPM/i-BUS/S.BUS Input power supply: 4.0-8.4V Display method: LED No ground interference ( Transmitting and receiving 1 m from the ground): Greater than 300m Working current: 40mA Each channel data: depend on the transmitter Channel delay: Less than 15mS Compatible Transmitter: Compatible with FS-i4, FS-i6, FS-i6S, FS-i6X, FS-i10, FS-GT2E, FS-GT2G, FS-GT2F Change i-BUS/S.BUS mode When turned on and bound, the transmitter and receiver can change output mode to i-BUS and S.BUS modes by pressing and holding the bind button for 2 seconds LED truns off for 1 second when flashed twice:i-bus OURPUT MODE led flashes twice then turns off for 1 second: S.BUS output mode active Colour:As Shown Material:Metal + Plastic Package Contents: 1x Flysky FS-A8S 2.4G 8CH Mini Receiver 1x Cable 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.