This Bluetooth transmitter has complete function buttons, and can support Bluetooth hands-free calling, which is more convenient and fast. The launch mode can be used on computers, TVs and other sound source devices that have no Bluetooth function, and can help these devices to transmit sound to Bluetooth speakers, Bluetooth headsets, etc. The Bluetooth transmitter lasts up to 12 hours and is compatible with a variety of devices. Weight: 100g Operating Range: Up To 10 Meters / 33 Feet (no obstructing objects) Charging Time: 2 Hours Working Time: 12 Hours Battery Type: Lithium Polymer (400mAh) Size: 65 x 45 x 21mm Packing list: 1 x Bluetooth 5.0 Receiver Adapter 1 x Micro USB Power Cord 1 x RCA Cable 1 x 3.5mm Auxiliary Cable 1 x User Manual