Item Details: New and high quality This extremely portable, lightweight wireless o transmitter and receiver is an ideal wireless o solution for a wide range of situations and uses. Transmitter mode: Wirelessly streams o from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakers. Receiver mode: Wirelessly streams o from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones. Switch between transmitter and receiver modes with the simple flick of a switch. Effortlessly connect using advanced Bluetooth technology and 3.5mm o cable (included). Super-portable o-streaming power. The device measures 44mm in diameter and weighs only 18g, yet delivers powerful wireless o streaming capabilities. Easily carry it in your backpack or laptop bag for on-the-go use. Broad compatibility: With the included 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter can be widely used with computers, laptops, home stereo systems, headphones, smartphones, MP3 players, CD players, and more. Specifications: Model: KN321 Technologies: Bluetooth 5.0, A2DP, AVRCP (receiver mode only) Operation 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 x 44 x 12mm Weight: 18g Package Contents: 1 x Bluetooth o Transmitter/Receiver Adapter 1 x Micro USB Power Cable 1 x RCA Cable 1 x 3.5mm Aux Cable 1 x User Manual Note: The actual color of the item may be slightly different from the pictures shown on the website due to factors such as monitor brightness and lighting conditions.