1. Supports Automatic Induction Switch When Mobile Phone Is Close, No Need For App System Bluetooth Direct Connection<br> 2. Support App/Small Program/Serial Port And Other Methods To Configure Parameters<br> 3. Support At Commands To Modify The Switch Lock Signal Value, Switch Lock Mode And Switch Duration<br> 4. Reserved Uart Interface To Support Sending And Receiving At Commands<br> 5. Low Power Consumption And Stable Performance<br> Product Name: Bluetooth Proximity Switch Single-Channel Relay Module, Automatic Sensing, Mobile Phone Proximity To Unlock<br> Model: Bluetooth Proximity Switch Single-Channel Relay Module<br> Note:<br> Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Not Affect The Use<br> Colour:As Shown<br> Material:PCB+Plastic<br> Package Contents:<br> 1 x Bluetooth Proximity Switch Single Channel Relay Module<br> 1 x 4P Single Row Pin<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.