This ultra-portable and lightweight wireless audio transmitter and receiver is the perfect wireless audio solution for every situation and application. Transmitter Mode: Wirelessly stream audio from your non-Bluetooth TV, home stereo, or CD player to your Bluetooth headphones or speakers. Receiver Mode: Wirelessly stream audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones. Switch between transmitter and receiver modes with the touch of a button. Easily connect using advanced Bluetooth technology and the included 3.5mm audio cable. This compact KN319 audio streaming powerhouse is only 44mm (1.73 inches) wide and weighs just 18 grams (0.63 oz), yet delivers powerful wireless audio streaming capabilities. Slip this transmitter and receiver into your backpack or laptop bag and take it on the go effortlessly. Broad Compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this receiver-transmitter adapter can be widely used with your computer, laptop, home stereo system, headphones, smartphone, MP3 player, CD player, and more. Specifications: Model: KN319 Technology: BT4.2, A2DP, AVRCP (receiver mode only) Operating Range: Up to 10 m / 33 ft (without obstacles) Charging Time: 2 hours Continuous Use Time: 6 hours (receiver mode) / 5 hours (transmitter mode) Battery Type: Lithium Polymer (200 mAh) Dimensions: 44 x 44 x 12 mm Weight: 18 g Package Contents: 1 x Bluetooth Audio Transmitter/Receiver Adapter 1 x Micro USB Power Cable 1 x RCA Cable 1 x 3.5mm Aux Cable 1 x User Manual