Power supplier: dc5v Output power:3w(1khz, thd10%) Frequency:60hz——18khz Signal&noise ratio:=95db Impedance:2.6 ohm(o) Li-ion output:3.7v~4.2v+0.05v Li-ion input:5v Lithium battery capacity:400mah Speaker unit:40mm Case material:Metal+abs Dimensions:60*60*50mm Weight:230g Color:silver/black/red/thread/gokden Bluetooth li-ion battery speaker (1) can play music by link to mobile phone?mp3?mp4?pc?ipod and other audio devices, if you devices have 3.5mm socket. (2) suitable for promotion, gift, store for sell. Pocket size to carry anywhere (3) charging indicator (4) bluetooth connect to pc/mobile/ipod and so on (5) microphone function (6) support tf card function (7) support fm function (8)nfc