ABS plastic; Wireless headphones featuring light inside headset illuminates your logo during use; Power/Technology: Rechargeable Lithium Polymer battery: 37V; Capacity 300 mAh; Input: 5V; Output: 025w; Frequency response: 20 HZ-20Khz; Transmission range: ?10m (approx 30 ft); Device must be charged prior to first use Charge time varies by device Minimum charge time: 15 hrs; Playback time: approx 4 hours (depending on volume and usage); Includes instructions and charging cable; LED logo lights up white; Features built-in microphone for hands-free call answering; Designed for use with most smartphones, MP3 players, tablets and computers: please test compatibility prior to purchase; Folded: 7w x 4.25h x 3.25d; In use: 8w x 8.25h x 3.125d; Product Size: 8 w x 8.25 h x 3.125 d; 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.