■ Power supply: DC 5V (USB) / 4 x AAA batteries (sold separately) ■ Battery life time: About 12 months (when using alkaline batteries) *Battery life may be shorter depending on battery performance and usage conditions. ■Bluetooth: Ver.4.0 ■Communication distance: Bluetooth: about 32.8 ft (10 m) / IR communication about 25.4 ft (7 m) *Depends on usage environment; Compatible operating system: iOS 8.0 or above/Android 4.4 and above; Input terminal: Micro USB cable connection jack; External dimensions (approximate): Width 3.3 oz (84 g) (84 g) (84 g) (excluding batteries); Accessories: Micro USB cable Approx. 4.9 ft (1.2 m). / Infrared Extension Cable (Approx. 3.3 ft (1 m)