Feature: 1. Durable: 4 hours of battery life, non destructive sound quality, hands free call, plug and play, sturdy and durable, AUX interface, long service life. 2. Connect to the TV: Connect to the TV's 3.5mm audio interface, and transmit the sound to the headset via wireless, so you are not afraid to disturb your family when watching movies at night. 3. Practical: This product can be connected to a car stereo, it can not only make calls, but also listen to dynamic music, so your journey is no longer alone. 4. Lossless Sound Quality CD Level Enjoyment: High resolution restoration of lossless sound quality, bring CD level music experience only one, you can listen to the music in your phone. 5. Fully Charged Once and Used for 4 Hours: The built in rechargeable lithium battery can be charged once, and can be used for 4 hours when the battery is low, which is convenient and worry free. Specification: Item Type: BT Audio Receiver Transmitter Material: Plastic BT Version: 5.1 Link Range: Approx. 15m/49.2ft Interface: 3.5mm/0.14in Audio Interface Signal to Noise Ratio: Less Than 110dB Built In Battery: Lithium Battery 140mAh(Include). Package List: 1 x Host1 x Charging Cable1 x 3.5mm Audio Head1 x User Manual