Pocket Sounds Mini Wireless Speaker Keychain.

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. WARNING: Item Contains LITHIUM BATTERIES and is restricted to ground shipping only.  CANNOT ship via air including to any U.S. address where part of the trip will be via air transport (i.e., Hawaii, Alaska, Puerto Rico).  CAN ship to Canada via Ground transport only.