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 Receiver Material: ABS Size: Approx. 19x32x6mm / 0.75x1.26x0.24in Number of Channels: 5 CH Operating Voltage: +5V~9V DC Receiving Protocol: PWM, CRSF Switchable Frequency Band: 2.4Ghz. Package List: 1 x ExpressLRS Micro Receiver Note: Please allow some error in manual measurement.