Features: brand new and high quality The mobile phone bracket loudspeaker subwoofer amplification is an induction speaker, amplified electromagnetic induction. Noise Reduction Processing:Transmission rate is high, the sound quality distortion is small, and the interference noise is reduced. Simple Operation: Simply phone, tablet, placed on the mutual inductance speaker can amplify the sound. Applicable Models: Can be used with all mobile phone, tablet PC support audio transmission External lithium battery power supply, low power consumption, high efficiency Were equipped with AUX line, also can link the computer and support MP3, MP4 and other equipment. Lighter to Carry: the speaker itself weighs only 260g, and can be put in the bag when going out. Specifications: Name: Mobile phone bracket loudspeaker Capacity: 750mAh Sensitivity: v (sense speaker power Power socket: MICR0 USB Playing time: 5 hours Input circuit: for DC. 5V/500mA Distortion: