... Metal case portable mini speaker FM, high-fidelity, low-power; for MP3,notebook,cellphone;last for 4 hours,with FM ... Capacity Polymer Li-ion Battery supports longer time play. Standard USB charging port. I Compact design , vibration speaker, High quality, ... silver, champagn gold,light green MaterialStainless steel ChargingLi-batteries or USB power Product sizeD60mm *H50mm NOTE:We have two versions of ...