EMB Professional EURO12BT Portable Rechargeable Wireless Speaker Built-in BLUETOOTH/SD/USB - MP3/WAV/WMA Playable - BLACK Color Feature: 2.1 outdoor passive HIFI Bluetooth Speaker with 5 1/4 inch Subwoofer. Output very clear sound and heavy bass, dynamic sound effect. With A2PD Bluetooth, wireless stream music from any Bluetooth enable devices such as your mobile phone ( iPhone, Samsung galaxy, HTC phones, Nokia etc ), notebook, iPad, laptop, Macbook... Secure simple pairing for user-friendly operating. 10 meters / 33 feet operating range. With USB and SD card Supporting / FM radio / EQ function / LED display, can show the digital number and working status. With Lin-in Function, suitable for PC, MID, TV and other audio devices. Two Gears volume control for volume and bass. Built-in lithium rechargeable battery 1000mAh; With handle and strap, easy to carry and take out. Specification: Horn Size: 5 1/5 inch - Subwoofer Size 5 1/2 Inch - Horn Output: 3W*2.4 - Subwoofer output: 12W,4 - Battery Capacity: 1000 mAh - Frequency Response: 100-20Khz - Power Supply: DC3.7V.