Compliant with Bluetooth 4.0 BLE standard<br> Support intelligent door lock app for opening doors<br> Built in RTC clock chip<br> Built-in antenna<br> Built in passive switch (relay)<br> Note:<br> 1. Below the minimum operating voltage, it may cause the module to malfunctionExceeding the maximum operating voltage may cause module damage<br> 2. Generally, modules are in a sleep state and only switch to other states when unlocking with the app<br> 3. Extreme environments can cause modules to malfunction<br> Note:The factory batches are different. If there is a slight difference in appearance, it does not affect the use.<br> Colour:Green<br> Material:Plastic<br> Size:38x27mm (excluding lines)<br> Package Contents:<br> 1 * Electronic Lock Module<br> Only the above package content, other products are not included.<br> 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.<br> Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-DIMEANI official store