GRWIBEOU Bluetooth 5.0 Audio Adapter Wirele 2-In-1 Audio Receiver and Transmitter Dual Mode Portable Double 3.5mm End Adapter Features:BT 5.0 Chip With intelligent chip, it offers stable transmiion, faster and stabler.RX+TX 2-in-1 Design Receive RX + transmit TX 2-in-1 design, free to switch to fulfil your different needs.High Quality Sound Can avoid interference during transmiion and restore the original sound of music.Portable Design It is small and portable, easy to carry in your backpack or laptop bag.Strong Compatibility This receiver and transmitter adapter can be widely used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc. Specification:Model: B12SBT version: V5.0Support protocol: A2DP, AVRCPBT distance: 10m(open space)Play time: Up to 5 hoursCharging time: About 1 hourCharging voltage: DC 5VInput/output: 3.5mm aux portMic sensitivity: -42dbCompatibility: compatible with phones and Pad of Android/IOS system and allmost BT audio devicesItem size:7.5*2*1.5 cm / 2.95*0.79*0.59 in(L * W * H)Item weight: Approx.17.1g /0.6ozPackage size:12.6*7.6*2.2 cm / 4.96*2.99*0.87 in(L * W * H)Package weight:53.1g /1.87oz Packing list:1 * Receiver & Transmitter Adapter1 * Charging Cable1 * Double 3.5mm End Adapter1 * User Manual