FEATURES & SPECIFICATIONS:, Wireless Speaker with Rich Stereo Sound, One 5 + Two 2 Built-in Speakers, Full Range Speaker and Passive Radiator Delivers Extra bass, Lightweight and Portable, BT V4.0 Compatible Allows Your Audio Systemto Work with BT Enabled Devices, USB, Micro SD, AUX & Mic Inputs Compatible, FM Tuner (87.5 - 108.0MHz), Output Power: 16W, Operating Voltage: DC 5V, Rechargeable Battery: 3.7V (2400mAh),Speaker Type:Mono Speaker W/ Passive Radiator,Output Power:AC: 110-240v-50/60hz,DC: 5V 500mA,FrequencyResponse:100-hz-20kh,Wireless Range:10M