From Innovative Technology, these speakers feature: wireless waterproof bluetooth rechargeable speakers last up to 30 hours per charge through its built-in rechargeable batteries wireless built-in rechargeable batteries last up to 10 hours on a full charge bluetooth reaches up to 33 ft. of range waterproof design Includes 2 USB charging cables and 2 USB wall chargers 5-Watt speakers Compatible with all Bluetooth enabled laptops, phones, tablets and more AC Adapter / Charger rechargable Lithium-Ion Battery Approx. 20.5" D x 8" W x 10.5" H Imported.