ABS Plastic round wireless speaker. Power/Technology: Rechargeable Lithium-Ion battery: 3.7V, Capacity: 300 mAh; Input: DC 5V/180mA; Output/Power: 3W; Work Current: 50mA; Impedance: 4?; Frequency response: 20Hz-20KHz; SNR:?70dB; Sensitivity: 85dB +/-2dB; Transmission range: 10M (30 feet); Wireless 4.1. Device must be charged prior to first use. Charge time varies by device. Minimum charge time: 2 hrs. Playback time: approx. 90 min (depending on volume and usage) Includes instructions and charging cable. FCC Approved. **This item can only ship to the contiguous U.S. and Canada via ground**