The Halterrego H.Sound wireless speakers areBluetooth V2.1 compliant and work with computers, games consoles, internettablets, smartphones, iPad and even iPhone. With a modern look, this H.Sound speaker system provides8 hours of continuous use (or 16 hours when only one speaker is switched on).Content:Type : Bluetooth V2.1 + EDR speakers Size (mm) : Speaker diameter: 137.5Charging base: 201.4 ×198.4 ×69.7Weight (g) : Speakers: 725.5Charging base: 238.2Other Information : Bluetooth frequency range: 2.40 GHz-480 GHzOperating distance: approx. 10 metres, class IIBattery time: approx. 16 hours Two speakers used together: approx. 8 hours Charging time: approx. 3 hours Voltage: 12V DC1 A