Product Specifications: Bluetooth Range: 10m. Empty Weight: 8.5g. Battery Life: More than 3 hours. Charging Time: About 2 hours. Tips: Not suitable for hearing aids. Main chip: BK3266 Bluetooth specifications: Bluetooth V5.0+EDR Bluetooth protocol support: HFP HSP A2DP AVRCP Receiving connections: 2 Working voltage: DC 3.2-4.2V Working current: <15mA Built-in lithium battery: 60mAH Working time: 4 hours Charging time: 2 hours Temperature range: -10 to +70 Wireless transmission range: 10 meters Transmitting power: CLASS2 Frequency range: 2.4GHz-2.480GHz External interface: 3.5 audio male jack, 3.5 audio female jack, USB MK male jack Delivery quantity: One piece Features: Works great with speaker systemConnect the speaker system perfectly to your phone without Bluetooth function, then you can stream stable music and enjoy music. Attach with Headphones: This Bluetooth receiver is very convenient for headphones, you can connect it directly to your headset (headphones with 3.5mm audio jack or 3.5mm audio cable), you can enjoy music or calls from your phone. Easy to Switch: Connect 2 Bluetooth smartphones at the same time. Easily switch between music mode and hands-free modes. Please note that one phone is played - another phone is paused. Product Description: Bluetooth 5.0 + EDR: The bluetooth adapter uses advanced Bluetooth 5.0 technology which provides more stable signal transmission with devices and delivers high quality sound. The range can be up to 30M. And it supports both devices to connect Bluetooth at the same time. Compatible Device: This car Bluetooth receiver allows to be compatible with most devices, iPhone, iPod, iPad, Android smartphones, tablets and other Bluetooth-enabled devices, easily plugs into vehicles, car stereos, home stereo audio system and speakers via the 3.5mm audio adapter. Hands-Free Support: With the built-in microphone, the wireless Bluetooth receiver has a simple control button that can free your hands to answer or reject calls and ensure your safety while driving. High Quality Audio: A2DP technology provides enhanced voice, attenuates the noise from the outside world to the maximum, so you can always receive clear and natural sound. You can enjoy wonderful music when you are in the house or in the car. Easy to Use: The Bluetooth receiver has Plug Play and AUX IN function. It only charges quickly via the Micro USB cable. It only takes a second to connect your speakers, headphones, car stereo as a bluetooth speaker, bluetooth headset, bluetooth car stereo and automatically connect to the last device. luckymeet