Power Supply: Input voltage DC 5-35V, via micro-USB 5V power supply. Bluetooth version 4.2: Effective transmission distance 10-15m/32.8-49.2ft, support memory connection. Dual audio output terminals: 3.5mm audio output terminal & 2.54mm 3P audio output terminal. Perfect for headphone, speaker, home stereo system DIY, have LED indicator. Power supply reverse protection, antenna external connection (suitable for mounting inside a metal box). BT Bluetooth Receiver Module Parameter: Input voltage: DC 5-35V Micro-USB 5V power supply Bluetooth version: 4.2 (10-15m/32.8-49.2ft , support memory connection) Bluetooth name: LQSC_BT Working temperature: -40 to 85 Feature: 1. Full Mounted Technology 2. Wide range of operating voltage 3. Power supply reverse protection 4. Dual audio output terminals 5. Antenna external connection (suitable for mounting inside a metal box) LED indicator instructions: Quick flashing: waiting for a connection Slow flashing: audio playing Remain on: connected 1. 3.5mm audio output terminal 2. 2.54mm 3P audio output terminal 3. On-board antenna, professional software 50 ohm impedance control 4. Foxconn external antenna interface 5. 5-35V extra wiring power supply terminal 6. Gold-plating pure copper 5V power supply port 7. Low noise LDO chip can withstand voltage up to 35V 8. Blue work indicator Colour: as shown Material: ABS Size: 5.5x3.2x0.9cm Package Contents: 1 x Audio Bluetooth Receiver Module Note: This item is a bluetooth receiver board, if used for speakers, please connect an amplifier. Otherwise, there will be distortion at high volumn. Only the above package content, other products are not included. Note: Light 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.