ER66S 25W HANDHELD MEGAPHONE WITH SHOULDER STRAP DOSS DOSSER66S delivers clear effective voice amplification especially for outdoor activities, such as election, sports,or public occasions. Features: Built in siren Hand grip type with shoulder strap Press to talk switch at the grip Press to talk switch with sound volume control while on shoulder Specifications: Power: MAX25W Range: 0. 5~0. 7km depending on operating conditions Battery: 8 x "C" type batteries OR 3 x 18650 batteries (not supplied) Speaker