Material: ABS Plastic. Wireless version 5.0 with rechargeable 300mAh lithium polymer battery. 3W speaker output. Approx. 30-foot wireless range. Microphone and call answer feature. Instructions and USB-C charging cable included. Features a carabiner clip that can be attached to your backpack or bag. 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.