SMART Mini AUX Bluetooth Car Kit with Hands free Calling with a Sensitive Mic / 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. Frequency range 2402MHz-2480MHz. 3.5mm audio out. Can answer calls. With Sensitive Build-in Microphone Operating range 10m-20m (Depending on environment). Need to be charged in FULL before first time use with a wall charger for 3-5 hours. Supper low power charge standby. LED indicator. Micro USB charging. Supports Bluetooth v3.0+EDR and Bluetooth 2.1, Bluetooth 2.0, 1.2, and 1.1 backward compatibility.