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).Mini and lightweight, slip this transmitter & receiver into your backpack or laptop bag and take it on-the-go without the slightest effort.With the included 3.5mm cable and 3.5mm to 2RCA cable, this receiver transmitter adapter has wide compatibility.Item Name: Transmitter/Receiver AdapterMaterial: ABSTechnologies: BT5.0, A2DP, AVRCP (Receiver Mode Only)Operation Range: Up to 10m/33ft (Open Space)Pairing name: KN321Charging Time: 2 HoursBattery Type: Built-in Li-Polymer Battery(200mAh)Size: 4.4cm x 4.4cm x 1.2cm/1.73" x 1.73" x 0.47" (Approx.)Notes:Due to the light and screen setting difference, the item& 39;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 Cable1 x Charging Cable1 x User Manual