PC speaker can play music by link to mobile phone,MP3,MP4, ... : Dia 5.2xH4.2cmWeight: 44gColor: White/BlackLi-ion battery mini speaker (1) Can play music by link to mobile phone,MP3 ... you devices have 3.5mm socket. (2) Suitable for Promotion, Gift, Store for sell. Pocket size to carry anywhere Power Source ... both the USB connector and 3.5mm Stereo connector PC Speaker, Promotional Gift