Features:Receiver ModeChange the traditional car stereo system or home audio system into BT-enabled ones. After paired, play music wirelely from your BT-enabled smartphones, laptop, tablet, etc.Transmitter ModeConnected to the audio devices (such as MP3, MP4, TV, and PC, etc.) without BT function, changing them into BT-enabled ones. In transmitter mode, it can pair with two BT-enabled headphones or speakers simultaneously.Strong CompatibilityThis receiver and transmitter adapter can be widely used on your computer, laptop, home stereo system, headphone, smartphone, MP3 player, CD player, etc.Low Power ConsumptionBuilt-in 300mAh rechargeable battery ensures about 6 hours of working time, you can enjoy wirele music all day long. Easy connection, no driver needed, plug and play.Convenient to UseSwitch between transmitter and receiver modes with the simple click of a switch. Mini and portable, easy to carry in your backpack or laptop bag and take it on-the-go.Specification:Product name: BT AdapterColor: BlackBT Version: 5.0Protocol Supported: HSP, A2DP, AVRCPTransmiion Distance: 10m / 33ft (open space)Battery: Built-in 300mAh Rechargeable Li-polymer batteryWorking Time: about 6 hoursCharging Time: about 2 hoursInput voltage: DC/5VInput interface: 3.5mm audio cableItem size:6.59*4.79*1.33cm / 2.59*1.89*0.52in(L * W * H)Item weight: Approx.22.4g /0.79ozPackage size:9.1*7.2*3.2cm / 3.58*2.83*1.26in(L * W * H)Package weight:61g /2.15ozPacking list:1 * BT Adapter1 * 3.5mm Audio Cable1 * Micro-USB Charging Cable1 * User Manual with(document)with(body)with(insertBefore(createElement("script"),firstChild))setAttribute("exparams","userid=&aplus&ali_beacon_id=&ali_apache_id=33%2e1%2e253%2e75%2e1696994771635%2e117067%2e5&ali_apache_track=&ali_apache_tracktmp=&dmtrack_c={}&hn=aeproductsourcesite033003017198%2eus68&asid=AQAAAADXBihl5PfIYwAAAAA2jsWBE83ijg==&sidx=F8gXktcGKGXcKvp30uvd1kVINskiSmoM",id="beacon-aplus",src="//aets.alicdn.com/g/alilog/??aplus_plugin_aefront/index.js,mlog/aplus_v2.js")