... -in Li-ion battery(3.7V/430mA Features:1.Material:Metal2.Output: 3W THD=10%,40MM3.Frequency response: 60-18KHZ4.SNR: ≥95dB5.Built-in Li-ion battery(3.7V/430mA ... ,PC,iPhone,mobile,MP3,MP4 etc8.Earphone connectivity available9.Bluetooth(3.0) playing music with mobile, Ipad and other electronic products ...