Description: Item Details: This ultra-portable, lightweight wireless audio transmitter and receiver is the perfect wireless audio solution for any situation, using Transmitter mode: to wirelessly transmit audio from non-Bluetooth TVs, home audio systems, or CD players to your Bluetooth headphones or speakers Receiver mode: Stream audio wirelessly from a Bluetooth-enabled phone, tablet, or computer to a wired stereo, speaker, or headphones Switch between transmitter and receiver modes with the touch of a button. Connect easily with advanced Bluetooth technology and a 3.5mm audio cable (included). The ultra-portable powerhouse of audio streaming, the KN319 is just 44mm (1.73in) wide and weighs just 18g (0.63oz), 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 receiver transmitter adapter can be widely used in your computer, laptop, home stereo, headphones, smartphone, mp3 player, CD player, etc. Specifications: Model: KN319 Technology: BT4.2, A2DP, AVRCP (receive mode only) Operating range: Up to 10m / 33ft (without any obstacles) Charging time: 2 hours Continuous use time: 6 hours (receive mode) / 5 hours (transmitter mode) Battery type: Lithium polymer (200mAh) Dimensions: 44 44 12 mm Weight: 18 g Package Contents: 1 x Bluetooth Audio Transmitter/Receiver Adapter 1 x Micro USB - power 1 x RCA cable 1 x 3.5mm auxiliary cable 1 x User Manual