SMART mini AUX Bluetooth Car Kit with Hands free Calling build-in Microphone / Wireless Music Streaming for Android Smartphone's , Apple iPhone , Blackberry , Tablets, MP3 Players & More! Share your music wirelessly from mobile phone, Notebook, PC, tablet pc, iphone and other Bluetooth device when connect with Aux speaker. Built-in microphone with Bluetooth hands free function. Built-in high capacity lithium battery 100mAh. Supports Bluetooth v3.0+EDR and Bluetooth 2.1, Bluetooth 2.0, 1.2, and 1.1 backward compatibility. Frequency range 2402MHz-2480MHz. 3.5mm audio out. Can answer calls. Operating range 10m-20m (Depending on environment). Supper low power charge standby. LED indicator. Micro USB charging.