Features: *Very convenient to use, simple wiring diagram connection way. *Support remote control up to 19 pieces. It can connect to the electronic control lock, light, electric curtain, etc. So that it can remote unlock the door, close the light, open or close the curtain, etc. *The working mode can be changed by yourself: you can switch to momentary, toggle, latching three modes as you need. *Learning pair code: it can work with any remote control with the same frequency, so you needn't worry about losing remote control any more. (If the remote control is lost, buy one and pair with the PCB board is OK.) *Small body, and it occupies less space. Specifications: Power: AC85-220V Standby Current: <5MA RF Frequency: 433MHz RF working mode: superheterodyne reception Receive sensitivity: -108dbm Transmitting distance: 100m open area Remote control storage: up to 19 PCS Working mode: Momentary, Toggle, Latching Wiring type: fixed terminal Output Terminal: NO , NC , COM Remote Control battery(Each): 1 * button battery (included) Supporting Remote Control Type: learning code (1527 chip) ; fixed code Package Information: Package Size: Approx. 10*8*3cm/3.9*3.1*1.2in Package Weight: Approx. 99g/3.5oz (1PCS Remote Control) Package Weight: Approx. 130g/3.5oz (2PCS Remote Control) Package List: 1* Smart Switch 1/2 optional * Remote Control