Descripiton:1. This extremely portable, lightweight wireless audio transmitterreceiver is an ideal wireless audio solution for a wide range of situations & uses 2. Receiver mode: wirelessly streams audio from your bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphones 3. Transmitter mode: wirelessly streams audio from your non-bluetooth TV, home stereo system, or CD player to your bluetooth headphones or speakers 4. Switch between transmitter & receiver modes with the simple flick of a switch. Effortlessly connect using advanced bluetooth technology & 3.5mm audio cable (included).5. Super-Portable Audio-Streaming Power: The KN319 is just 44mm (1.73) across & weighs only 18g (0.63oz), but has got powerful wireless audio streaming capabilities. Slip this transmitterreceiver into your backpack or laptop bag & take it on-the-go without the slightest effort.6. Broad Compatibility: With the included 3.5mm cable & 3.5mm to 2RCA cable, this Receiver Transmitter adapter can widely be used on your computer, laptop, home stereo system, headphone, smartphone, Mp 3 player, CD player, etc. Feature: Model KN319 Technologies BT4.2, A2DP, AVRCP (receiver mode only) Operation Range Up to 10m / 33ft (without any blocking objects) Charging Time 2 hours Continuous Use Time 6 hours (Receiver Mode)5 hours (Transmitter Mode) Battery Type Li-Polymer (200m Ah) Size 444412mm Weight 18g Package Included:1 X bluetooth 4.2 Audio Transmitter/ Receiver Adapter 1 X Micro USB (Universal Serial Bus) Pow