Description: Can choose theheadphoneoutput mode, public places DND listening. Light and beautiful appearance, flexible and portable design, easy to carry. Professional debugging matching speaker unit, the output sound clear, full, loud. Charging design, intelligent, fast charge, environmental protection, stable and safe. Special power design, less power consumption, long time to play music, fully meet your ear. The SMD electronic components, glass fiber double-sided board manufacturing, superior performance stable and durable. And is powered by a lithium battery fully closed, remove your trouble handling the battery has the advantages of large capacity, long service time. Details: Performance parameter: SNR: ≥ 80dB Charging time: 4-8 hours Speaker impedance: 4 ohm Dimensions: 88 "40mm. 87" The maximum output power: 25W Earphone impedance: 16-32 ohms Frequency response: 120Hz ~ 12KHz The host weight: 300G (including battery) TF Card playback formats: support MP3 format The radio frequency signal: 87.5MHz-108MHzFM Working voltage: 7.4V\/1800MAH (lithium batteries) The power adapter: output DC:9V\/500MA (AC:110-240V input) A full battery continuous playback of sound time: 4 ~ 8 hours (moderate volume) Package included: 1 x Amplifier 1 x The power adaptor DC:9V\/500MA 1 x Antenna 1 x Purse belt 1 x Belt 1 x The statement 1 x The warranty card