Feature:1. Receiver Mode: Wirelessly transfer audio from BT enabled mobile phones, tablets or computers to wired stereo speakers, speakers or headphones.2. Transmitter Mode: Wirelessly transfer audio from a non BT TV, home stereo system or CD player to a BT headset or speaker.3. Lightweight Portable: Light weight, easy to carry, ideal wireless audio solution for various situations and purposes.4. Simple to Use: Just tap the switch to switch between transmitter and receiver modes, easy to connect.5. Wide Compatibility: The adapter can be widely used in computers, laptops, home stereo systems, earphones, phones, Mp3 players, CD players, etc.Specification:Item Type: Low Latency AdapterMaterial: ABSProduct Size: Approx. 4.2 x 4.2 x 1cm / 1.7 x 1.7 x 0.4inModel: KN319Technology: BT4.2, A2DP, AVRCP (Only Receiver Mode)Operating Range: Up to 10m / 33ft (Without Any Obstructing Objects)Charging Time: 2 HoursContinuous Use Time: 6 Hours (Receiver Mode)/5 Hours (Transmitter Mode)Battery: Lithium Polymer (Built in)Model: 502030Capacity: 200mAh.Package List:1 x Low Latency Adapter 1 x USB Power Cord1 x RCA Line1 x 3.5mm Cable1 x User ManualNote:Ship with built in battery.