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HIFI Portable Wireless Bluetooth Speaker Stereo Sound Subwoofer Column Speakers with Hand Strap for Computer Phones Features: Outdoor Bluetooth Speaker, Built-in bluetooth V2.1 wireless transmission, working distance up to 10 meters. Support to Hand-delivery when call all Bluetooth devices such as smart phones, tablet PCs, iPODs ... Bluetooth chip, clear sound and perfect quality, powerful bass and can enjoy unhindered stereo music anytime, anywhere when you're out. stereo audio transmission protocol supports rechargeable. Specifications: Functions: Bluetooth connection, plug wire connection Bluetooth version: V2.1 Speaker size:5.5x5.5x5cm material: ABS Reception distance: 10 m and below Output power: 3W Working?5 hours Distortion??0.5% Battery capacity:520mAh Battery charge time?2 hours Signal to noise r-atio: ?95dB Operating Voltage: 5 V Package Includes? 1x Bluetooth Speakers 1 xUSB cable