IP3640B Features Bluetooth wireless speaker giving you unlimited music fun Mobile phone calls and redial function Can directly play music from an external TF card USB audio card function Supports audio input Built-in rechargeable lithium battery Memory ability for FM channel， volume and TF song name Easy to operate General Specs Brand & Model DOGO DG-868 Bluetooth v2.1+EDR (MVSILICON/ISSC chip) Color Black Rated Power 2 x 2.5W Frequency 100-25KHz 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  3.7v lithium battery Charging Method Charge with USB cable (5v/500mA) Adjustment Method Keys Dimensions 40 x 57 x 155 mm Speaker Specifications 40， 16-core， with radiator Shell Material ABS plastic， silicone and metal mesh Weight 242 g Package Details Weight: 349.89 g Size: 16.5*7.00*6.2 cm Package Includes * DOGO DG-868 Water Cubic Bluetooth Wireless Speaker with Hands-free Call， Card Reader & Subwoofer

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