Feature:1. Professional Design: ELRS receiver with PWM output. Supports 5 PWM outputs. It also supports flash CRSF output firmware, when CH2 corresponds to TX and CH3 corresponds to RX.2. Failsafe: In case of connection or signal loss between the radio transmitter and receiver, the failsafe function adjusts all channels to the user set failsafe value, maximizing safety and preventing flyaways.3. Cautions: If you are not using a flight controller, such as an RC fixed wing, it is necessary to set the fail safe values correctly.4. Widely Applicable: ExpressLRS micro receiver module is suitable for fixed wing, helicopter, RC car, boat and many other types of models.5. Lightweight and Compact: ELRS micro receiver is light weight, 19x32x6mm / 0.75x1.26x0.24in size can be easily placed in most model nacelles, plug and play. The design with housing is more simple and convenient.Specification:Item Type: ExpressLRS Micro ReceiverMaterial: ABSSize: Approx. 19x32x6mm / 0.75x1.26x0.24inNumber of Channels: 5 CHOperating Voltage: +5V~9V DCReceiving Protocol: PWM, CRSF SwitchableFrequency Band: 2.4Ghz.Package List:1 xExpressLRS Micro Receiver Note:Please allow some error in manual measurement.