2 Pcs Electronic Accessories: 1 x MP3 Bluetooth Decoder Module & 1 x Switch Round LED   Dot LED Light Car Boat Round Rocker ON / OFF the SPST switch Condition: 100% brand new   Voltage: 12V DC Type: 2 pine (3 Pins with LED) SPST: ON / OFF   It can be wall switches for additional electronic equipment has inside and outside of the car. (such as flashing lights, lamps chassis and ceiling)   Model Number: MP3 Bluetooth Decoder Board Loss      Easy to install.   All you need is a (19mm) hole 3/4 inch and the switch will sit in many; no more square cuts.   Our switch is book with a slot for kyhole to prevent the unwanted rotation.   SPST 2 pole design (On / Off) 3 poles with LED for being related grounded.   DNR: 91dB   Support Profile: A2DP / AVCTP / AVDTP / AVRCP / HFP   LOS:more than the 15m   USB powered Universal Micro- USB 5V power supply   3.7-5V Supply Pad External 3.7-5V lithium battery power conversion   LED indicator Bluetooth mode long blue light   After the power is turned on, the blue indicator lights up and enters the Bluetooth mode; the English "The bluetooth device is ready to pair" is displayed, indicating that the Bluetooth mode is entered and waiting for pairing; the "XY_BT" searched by the mobile phone Bluetooth is the device name of the decoding board. , Click on the connection, the decoder board prompts "The bluetooth device is connected successfully", indicating that the decoder board and the mobile phone are connected successfully, you can play music. As shown below Picture;   Power Supply: 3.7-5V   SNR: 90dB   THD + N: -70dB   Crosstalk: -86dB   colour:red   Material:PC + Metal      Package Contents:   1 x MP3 Bluetooth Decoder Module   1 x Switch Round LED      Only the above package content, other products are not included.   Note: Light shooting 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.