Item Details: Brand new and high quality * This extremely portable and lightweight wireless audio transmitter and receiver is an ideal wireless audio solution for a wide range of situations and uses * Transmitter Mode: Wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakers * Receiver Mode: Wirelessly streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones * Switch between transmitter and receiver modes with the flick of a switch. Connect effortlessly using advanced Bluetooth technology and a 3.5mm audio cable (included). * Super-portable audio streaming power The KN319 measures just 44mm (1.73") in diameter and weighs only 18g (0.63 oz), yet packs powerful wireless audio streaming capabilities. Slip this transmitter and receiver into your backpack or laptop bag and take it with you effortlessly. * Wide Compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this transmitter receiver adapter can be widely used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc. Specifications: * Model: KN321 * Technologies: BT5.0, A2DP, AVRCP (receiver mode only) * Operating Range: Up to 10m/33ft (without any blocking objects) * Charging Time: 2 hours * Continuous Use Time: 4 hours (receiver mode) / 3 hours (transmitter mode) *Battery Type: Li-Polymer (200mAh) *Dimensions: 44 × 44 × 12 mm Package Contents: 1 * Bluetooth Audio Transmitter/Receiver Adapter 1 * Micro USB Power Cable 1 * RCA Cable 1 * 3.5mm Aux Cable 1 * User Manual