IP3637L Features Bluetooth wireless speaker giving you unlimited music fun Supports hands-free call and redial function Can directly play music from an external TF card USB audio card function Supports audio input Memory ability for FM channel， volume and TF song name General Specs Brand & Model DOGO DG880 Bluetooth v2.1+EDR (RDA chip) Color Blue Rated Power 3W Frequency Response 100-20KHz Signal/Noise Ratio 65 dB External Sound Input 350-450mV FM Frequency 87.5-108.0MHz Bluetooth Distance ≥ 25 m (no obstacle) Low Battery Prompt Yes Degree of Distortion 0.1% (3.7v 0.5W) Battery Type 3.7v lithium battery Charging Method Charge with USB cable (5v/500mA) Adjustment Method Keys Dimensions 65 x 62 mm Speaker Specifications 45， 16-core， dual-magnet， with radiator Shell Material ABS plastic， fuel injection and zinc alloy Weight 128 g Package Details Weight: 221.49 g Size: 7.5*7.5*9.5 cm Package Includes * DOGO DG880 Bluetooth Wireless Speaker with Hands-free Call， Card Reader， FM Radio & Subwoofer