Specifications:This extremely portable, lightweight wireless audio transmitter & receiver is an ideal wireless audio solution for a wide range of situations and uses.Transmitter mode: wirelessly streams audio from your non-Bluetooth TV, home stereo system, or CD player to your bluetooth-compatible headphones or speakers.Receiver mode: wirelessly streams audio 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-compatible technology and 3.5mm audio cable (included).Slip this transmitter & receiver into your backpack or laptop bag and take it on-the-go without the slightest effort.Broad compatibility: with the included 3.5mm cable and 3.5mm to RCA cable, this receiver transmitter adapter can widely be used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc.Item Name: Transmitter/Receiver AdapterMaterial: ABS + SiliconeTechnologies: BT4.2, A2DP, AVRCP (Receiver Mode Only)Operation Range: Up to 10m/33ft (Open Space)Charging Time: 2 HoursContinuous Use Time: 6 Hours (Receiver Mode)/5 Hours (Transmitter Mode)Battery Type: Built-in Li-Polymer Battery(200mAh)Size: 4.4cm x 4.4cm x 1.2cm/1.73inch; x 1.73inch; x 0.47inch; (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:1 x Transmitter/Receiver Adapter1 x 3.5MM Audio Cable1 x RCA Audio Cable1 x Charging Cable1 x User Manual