Operating Voltage:3.5V~8.4VDimension:23.6x18.4x28.4mmWeight:7.3gChannels:4CHPWM Mode:Normal/ SHR/ SSRCompatible with SANWA FH3/FH4T remote control system.Suitable for use with: M12, M11X, EXZES X, MT-4, GEMINI X, MT-S, MT-4S, M12S, M17.Features:1) Bidirectional communication system, monitor the receiver voltage by transmitter in real time.2) Operating voltage: 1-2s lipo, sudden voltage drop won't cause loss of control.3) High sensitivity built-in antenna, 4CH output + BAT port suitable for all kinds of applications.4) L-shape design, small size to save space.