Features:This extremely portable, lightweight wirele audio nsmitter & receiver is an ideal wirele audio solution for a wide range of situations and usesnsmitter mode:wirelely streams audio from your non-Bluetooth TV, home stereo system, or CD player to your Bluetooth headphones or speakersReceiver mode: wirelely streams audio from your Bluetooth-enabled phone, tablet, or computer to your wired stereo, speakers, or headphonesSwitch between nsmitter and receiver modes with the simple flick of a switch. Effortlely connect using advanced Bluetooth technology and 3.5mm audio cable.Specifications:Technologies: BT5.0,A2DP, AVRCP (receiver mode only)Operation Range: Up to 10m / 33ft (without any blocking objects)Pairing name:KN321/KN326Charging Time: 2 hoursWorking Time: RX:6 hours ; TX:5 hoursBattery Type: Li-Polymer (200mAh)Dimensions: 44 × 44 × 12mmWeight: 18gNote:Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you!Please allow 1-2cm measuring deviation due to manual measurement.Package Included:1 x Bluetooth 5.0 Audio nsmitter/Receiver Adapter1 x User ManualNO Retail box,Packed safely in bubble bag.