TWS (True Wireless System) allows two TWS ready speakers to connect, sync, and play Bluetooth audio simultaneously for a true stereo sound. The dual 3" speakers play your favorite tunes from a Micro/USB/MP3 port, Bluetooth or FM tuner, Features LED lights, built-in microphone, hands free phone link, headphone output, and USB Aux input. Rechargeable 2200 mAh battery provides hours of use per charge. Bluetooth audio Rechargeable Tws Led party lights. Built-in microphone Hands free phone link Usb/tf card ports Usb aux input Usb cable, user manual. Battery Type: Lithium Ion Measurements: 4.1 Height/Inches, 3.7 Width/Inches, 10.3 Length/Inches Weight (lb.): 3 Lb Country of Origin: Imported