Feature: 1. Transmitter Mode: Wirelessly transmit audio from a non blue TV, home stereo system or CD player to a BT headset or speaker. 2. Receiver Mode: Wirelessly transmit audio from blue mobile phones, tablets or computers to wired stereo, speakers or headphones. 3. Simple Operation: Just flip the switch gently to switch between transmitter and receiver modes. Easy connection using advanced blue technology and 3.5mm audio cable (included). 4. Portable: With powerful wireless audio streaming function, an ideal wireless audio solution. Tucked into your backpack or laptop bag, lightweight and portable, suitable for various purposes. 5. Wide Compatibility: The included 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter can be widely used in your computer, laptop, home stereo system, headset, smartphone, Mp3 player, CD Player etc. Specification: Item Type: BT Transmitter Receiver Material: ABS Technology: BT5.0, A2DP, AVRCP (Receiver Mode Only) Operating Range: Up to 10 Meters/33 Feet (Without Any Obstructions) Charging Time: 2 Hours Continuous Use Time: 7 Hours (Receiver Mode)/6 Hours (Transmitter Mode) Built In Polymer Lithium Battery: 200mAh. Package List: 1 x BT Adapter1 x Audio Cable1 x RCA Line1 x USB Cable1 x Manual Note: Ship with built in battery