Features: 1. Durable: It has 4 hours battery life, lossless sound quality, hands-free calling, plug and play, AUX interface. 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. Description: It can connect the wireless to the car stereo, which can not only make calls, but also listen to dynamic music, so that your journey is no longer lonely. Specifications: Product model: C28 wireless audio receive and send combo Product color: black Battery capacity: 140Amh(battery included) Working range: 10m (without obstacles) Charging time: 1h Use time: 4h Suitable type: computer, TV, projector (transmission mode) / speaker, earphone (reception mode) Gross weight: 41g Packing: 103 * 68 * 18.3mm Package Included: 1 pc*audio receiver(battery included) Notes: 1. Please allow 0-1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from real object.