Wireless Speaker with Micro SD & USB Inputs Wireless Speaker with Rich Stereo Sound Full Range Speaker and Passive Radiator Delivers Extra bass Lightweight and Portable BT V4.2 Compatible Allows Your Audio System to Work with BT Enabled Devices Built-in Microphone Allows You to Talk When You Make a Phone Call Seamlessly Switch From Music to Hands-Free Calling USB/Micro SD & AUX Input Compatible Digital FM Tuner (87.5 - 108.0MHz) Output Power: 10W x 2 Rechargeable Battery: 2 x 3.7V (1800mAh) Operating Voltage: DC 5V Charging Time: 4-5 hrs. Play Time: 2 hrs. Operating distance: 10m Speaker Type: Mono Speaker W/ Passive Radiator Output Power: 20watts Frequency Response: 150-18000hz Rechargeable Battery: 5v/1a Up To 2hrs. Play Time Wireless Range: 10m Accessories: USB, AUX Cables, and User Manual