Description: 2-in-1 bluetooth transceiver, suitable for TV, PC, CD player, Laptop, Tablet, with 3.5mm ports, pairing with Bluetooth stereo headphones or speakers.  Compact design, round shape, you cna used at home or carry in trip. Bluetooth 5.0, low latency, connect with older home o systems and wired headphones via 3.5mm aux cable/adapter. Auto shutdown, when 10 minutes without connection.Long wireless range, up to 30 feet( 10m ) away. USb cahrging, Built in 180mAh rechargeable battery, one single charge can last up to 7.5 hours. Specification: Voltage: DC 3.2-4.2 V Current: ≤24mA Working time: 7.5 hours Battery: 180mAH Charging current: 150mA Charging voltage: DC+5V Charging time: 1.5 hours Wireless transmission range: 10 meters Frequency range: 2.4G-2.480GHz Size Chart: Size: approx. 43x42.1x12.8mm / 1.69x1.67x0.50 inch Package Includes: 1 Piece Wireless o Adapter 1 Piece o Cable 1 Piece Manual Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you