1、BT TRANSMITTER RECEIVER: 2-in-1 BT audio transmitter receiver, lightweight and compact, equips with LED indicator and 3.5mm \u0026 optical jack, for multiple audio output/input options, suitable for watching movies, home party, etc. 2、TX MODE: It is used as transmitter that can wire with your TV, computer or other equipments by audio cable, wirelessly stream music to your BT-enable headphone or speaker(up to 2 devices simultaneously). 3、RX MODE: It works as receiver, allowing wired connectivity of your home stereo system, like speaker or amplifier, to play music from your cellphone, laptop such devices available for BT function. 4、WIRELESS AUDIO TRANSMISSION: Built-in advanced BT5.0 chip, ensures fast stable signal transmission, in a long distance of 10 meters(33 feet), for lossless clear sound with no delay. 5、LONG BATTERY LIFE: Premium battery of high capacity inside, convenient to recharge, capable of working while charging, supports 7-8 hours long use time after one 2 hours full charging. Features: BT TRANSMITTER RECEIVER: 2-in-1 BT audio transmitter receiver, lightweight and compact, equips with LED indicator and 3.5mm & optical jack, for multiple audio output/input options, suitable for watching movies, home party, etc. TX MODE: It is used as transmitter that can wire with your TV, computer or other equipments by audio cable, wirelessly stream music to your BT-enable headphone or speaker(up to 2 devices simultaneously). RX MODE: It works as receiver, allowing wired connectivity of your home stereo system, like speaker or amplifier, to play music from your cellphone, laptop such devices available for BT function. WIRELESS AUDIO TRANSMISSION: Built-in advanced BT5.0 chip, ensures fast stable signal transmission, in a long distance of 10 meters(33 feet), for lossless clear sound with no delay. LONG BATTERY LIFE: Premium battery of high capacity inside, convenient to recharge, capable of working while charging, supports 7-8 hours long use time after one 2 hours full charging. Specifications: Material: plastic + electronic components Color: black BT version: V5.0 Transmission distance: 10m Frequency range: 2.402GHz~2.480GHz Support protocol: AVRCP A2DP Battery capacity: 300mAh Charging time: 2h Working hours: 8h (TX ), 7h (RX) Power input port: Micro USB Input/output interface: 3.5mm audio, optical One-to-two pair simultaneously: Yes (TX) Product size: 64.5*64.5*18mm / 2.53*2.53*0.70in Product weight: 48g / 1.69oz Package size: 12*10*5.4cm / 4.72*3.93*2.12in Package weight: 158g / 5.57oz Note: BT transmitter receiver and cables only, other accessories in the pictures are not included. All data is just for reference only, please refer to actual product. Due to manual measurement, there may be deviation, please in kind prevail. Due to lighting or other reasons, the picture and material object may slightly differ. Packing List: 1 * BT Transmitter Receiver 1 * USB Power Cable 1 * Optical Cable 1 * 3.5mm Audio Cable 1 * 3.5mm Male to RCA Male Cable 1 * User Manual 1 * BT Transmitter Receiver 1 * USB Power Cable 1 * Optical Cable 1 * 3.5mm Audio Cable 1 * 3.5mm Male to RCA Male Cable 1 * User Manual