Compliant with Bluetooth 4.0 BLE standardSupport intelligent door lock app for opening doorsBuilt in clock chipBuiltin antennaBuilt in passive switch (relay)Note:1. Below the minimum operating voltage, it may cause the module to malfunctionExceeding the maximum operating voltage may cause module damage2. Generally, modules are in a sleep state and only switch to other states when unlocking with the app3. Extreme environments can cause modules to malfunctionNote:The factory batches are different. If there is a slight difference in appearance, it does not affect the use.Colour:GreenMaterial:PlasticSize:38x27mm (excluding lines)Package Contents:1 * Electronic Lock ModuleOnly 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 +13cm.