Mini wireless speaker key chain made of Aluminum Alloy with ABS Plastic. Power/Technology: Rechargeable Lithium-Ion battery; Input: 5V; Capacity: 140 mAh; Sensitivity: 100+-3dB at 2kHz; Frequency Response: 20Hz – 20 KHz; Transmission Range: 10m (30 ft); Wireless V 4.2. Playback time: Approx. 2.5 hours, depending on usage. Must be charged prior to first use. Charge time varies by device. Minimum 2 hours. Features LED indicator light, that shines red while charging (light goes off once charge is complete). Instructions and charging cable included. FCC Approved. This item can only ship via Ground. This item cannot ship internationally EXCEPT to Canada via ground. This item cannot ship to Hawaii, Alaska, Puerto Rico or any other destination where the package must go into a plane.