AS+ABS Plastic; Wireless rechargeable earbuds with microphone in compact round storage case ; Buds features color silicone accent; Power/Technology: Rechargeable Lithium Polymer Battery, Capacity: 35 mAh; Input: 5V; Impedance: 8O; Work Current: 20 mA; Sensitivity: 100±3dB; Frequency response: 20-20000hz; Transmission range: 10m (approx. 30 ft); Features LED indicator light: glows red during charge, light turns off once charge is complete; Use microphone for hands free calling ; Product Size: 1.5 h x 2.5 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.