B: two-way (5V power supply) Features of two-way type: 1 channel servo signal input, control two-way electronic switch. Only supports 5V voltage receiver, otherwise it may cause module damage. If the receiver and servo use a high-voltage system, a voltage reduction module should be added to the module before it can be used. PWM frequency: 50HZ. PWM cycle: 20MS High level: 1700US channel 1 is on, Less than 1300US channel 2 is on, 1300-1700US the channels are all closed Size: 41x25x14mm. Cable length: about 30cm. Weight: about 20g. Used for RC model airplane, car, boat. Description of two-way type: 1. Connect: Plug the signal input cable into an idle receiver channel that corresponds to a switch on the remote controller. The power indicator be illuminated when connected to the receiver. The work indicator lights up when the switch channel is open and vice .<br><br>2. Working mode: The POWER LED indicates the power status. The remaining LEDs indicate the operational status of the relays. 3. Trigger (Taking the throttle channel as an example) When the throttle stick on the remote control is set to full throttle, one relay closes (., the wiring at both ends are connected). When the throttle stick is set to half throttle, neither two relays are not closes (both two way are not connected). When the throttle stick is set to minimum throttle, the other relay closes (., the wiring at both ends are connected). Application range: Remote control model launch Remote control model smoke control Weapon system control like real machine Smoke control of the model aircraft Control of remote switching systems Switch signals between two cameras Control the power conduction and disconnection of electrical equipment, such as aviation lights, searchlights, explosion lights, buzzers, etc. Control the camera shutter or switch between recording and photography modes Color: As shown Material: PC+Plastic<br><br>Package Contents: 1pcs x relay<br><br>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.