This extremely portable, lightweight wire-less audio trans-mitter & receiver is a perfect wire-less audio solution for a wide range of situations and uses. It has small body but got powerful wire-less audio streaming capabilities. Slip this trans-mitter & receiver into your backpack or laptop bag and take it on-the-go without the slightest effort. Features: 2 in 1 design, can be used as Trans-mitter or Receiver. Trans-mitter mode: wirelessly streams audio from your non-BT TV, home stereo system, orcompact disc player to your BT headphones or speakers. Receiver mode: wirelessly streams audio from your BT-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones. Has broad compatibility. With the included 3.5mm cable, can widely be used on your computer, laptop, home stereo system, headphone,smartphone, Mp3 player, compact disc player, etc. Easy to use. Just plug and play. Mini and lightweight, convenient to carry. Specifications: Model: KN320 Technologies: BT5.0, A2DP, AVRCP (receiver mode only) Operation Range: Up to 10m / 393.7in (without any blocking objects) Pairing Name (Receiver Mode): KN320 Trans-mitter Mode: Red Led light is on Receiver Mode: Blue Led light is on Item Size: 32 * 17 * 8.5mm / 1.26 * 0.67 * 0.33in Package Size: 80 * 65 * 22mm / 3.15 * 2.56 * 0.87in Package Weight: 30g / 1.06ounces Note: 1.Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. 2.Please allow a little measuring deviation due to manual measurement. Package List: 1 * Audio Trans-mitter/Receiver Adapter 1 * 3.5mm Aux Cable 1 * User Manual