Summarize: LC 12V Bluetooth relay module includes a single channel 12V/10A relay module and SPP-C Bluetooth serial port slave module. It can be controlled via mobile phone app commands to operate the relay switch. Onboard SPP-C Bluetooth serial port slave module provides wireless control functionality. Module features diode protection and fast response time. Onboard Bluetooth status indicator light (slow blink when not connected, solid when connected) and relay status indicator light. Control distance up to 10 meters in open environment. Technical parameters: Bluetooth 2.1 + EDR specification. Module working voltage VCC: DC 12V. Maximum DC control voltage: DC 30V. Maximum AC control voltage: AC 250V. Color: Blue. Material: PCB. Size: 62 x 20mm. Package contents: 1 x 12V relay module. Only the above package content is included; other items are not included. Note: Lighting and different displays may cause slight color differences between the image and the actual item. Measurement error allowed is +/- 1-3cm.