Features: Enjoy your favorite radio stations anywhere thanks to enhanced connectivity technology enables stronger and more stable signal. A surface that grips. A sturdy frame. And a portable size and weight. All make this speaker a breeze to carry around. With USB Charging Port, can also be used as a power bank to charge the mobile phone. Built in 1800mAh large capacity lithium battery ensures up to 10 hours playback time. Specification: Type: BT601, BT602, BT603(optional) Color: Black BT Version: V5.1 BT frequency: 2402-2480MHZ Sound channel: 2.0 dual-channel stereo Built-in lithium battery: 1800mAh TF card: up to 32G(NOT INCLUDED) Speaker Diameter: 53x53mm*2, 4 5W*2 Function: Bluetooth, plug-in card, FM, cell phone computer TV USB audio input Music playback time: 4-6 hours Product Size: L400*W70.8*H68.3mm Product weight: 969g Package List: 1 * BT Speaker