ABS plastic;Lightweight design with rechargeable battery, this powerful 3W speaker provides up to 90 minutes of playback time when fully charged; Power/technology: rechargeable lithium-ion battery: 3.7V, capacity: 300 mAh; input: DC 5V/180mA; output/power: 3W; work current: 50mA; transmission range: 10M (30 feet) ; Includes instructions and charging cable; Product Size: 2" d x 2.25" dia.; Shipping available to contiguous U.S. addresses and Canada via Ground only. Cannot ship via Air, Internationally or to Alaska, Hawaii, Puerto Rico and any other small U.S. island territory.