Specification: Driver Units: 2 X1.5"anti-magnetic, 8ohm, 2W speakers. Amplifier Impedance: 8 ohms. SNR:38dB; Output power:2W*2. Input: 3.5mm Stereo headphone Jack, Direct Input. Output Power: 2W*2. Input:3.5mm Jack,USB port,suit for CD ,MP3/MP4,Laptop,PC. Frequency Response: 120HZ-20KHZ. Power supply: Built-in rechargeable Li-Ion battery. Dimension(L*W*H): 240*86*86MM. Net Weight: 200g. Below are some reasons to source from us: * 9-day delivery lead time and two-year warranty. * All our products comply with an AQL value, subjecting to a battery of QC tests: high and low temperature, drop, vibration. * Our own patented technology. * More innovative design and quality guaranteed. * All our products are RoHS Directive Compliant and carry the CE, FCC, FDA and UL approvals needed sell in international markets; * Compact Hi-Fi speaker systems for portability and convenience. These speakers produce impressive sound quality.