Item name: FS2A 4CH ReceiverChannels: 4CHOutput signal: PWMFrequency range: 2.408-2.475GHZ width: 135Receiver sensitivity: -92DBM2.4G mode: AFHDS 2AFailfe: YesSupply voltage: 3.3-10VDistance: 400+ metersWorking current: 20MASupport: -I6, -I6X, -I6S, -TM8, -TM10, -I10 and other AFHDS 2A protocol transmitter:1. Press and hold the key on the receiver and connect the to the receiver. The blue light on the receiver flashing, get into bindind mode.2, Set the transmitter into mode (confirmed AFHDS 2A protocol). After getting into mode, the receiver light changes from flashing to slow flash.3, Transmitter get out of mode, then the receiver blue light becomes . Indicates the signal receive is successful.Failsafe settings:The receiver can normally receive the transmitter signal, push the rocker to the the failsafe set, long press the receiver button, the blue light flashes quickly several and then always , failsafe settings is successful.Colour:blackMaterial:PCBPackage Contents:2 x FS2A 4CH AFHDS 2A Mini Compatible ReceiverOnly the above package content, other products are not included.Note: Light 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.