Description: 2 in 1 Bluetooth transmitter /receiver, transmission state two Bluetooth devices to connect and play at the same time. 3.5mm audio adapter suitable for TV, car, computer, laptop, PC, home stereo, headphone, smartphones, CD players, etc. Built-in microphone, support Bluetooth call function, suitable for headset, car audio. Built-in 280mAh rechargeable lithium battery, can last 9 hours. Support Bluetooth stereo music DSP technology (Audio Bluetooth only) ,LCD digital screen display, AUX audio input/audio output. Quick pairing and aoto shup down, after 5 minutes without device connection, the machine will shut down automatically. Specification: Type: Bluetooth receiver/transmitter Gross weight: 73 g Battery capacity: 280mAh Charging voltage: 5V Charging current: 50mA Operating current: 5mA Close current: 41U= Charging time: about 2 hours Working time: about 9 hours Bluetooth transmission distance: 10M Bluetooth microphone effective distance: 0.2-2m Bluetooth version: version 5.0 Bluetooth specification support: A2DP, AVRCP, HFP, HSP Size Chart: Size: approx. 65x16x39mm / 2.56x0.62x1.53 inch Package Includes: 1x Bluetooth Transmitter Receiver 1x Manual 1x 3.5mm Audio Cable 1x USB Charging Cable