1. Digital display 2. USB/TF card slot 3. FM radio 4 ... Horn specification: 4 Ω, 3w4. L196 × W83 × H52mm5. USB-powered supply: 2.5W * 26. battery-powered supply: 1. ... 150 hz ~ 18 KHZ 8. power voltage: DC5V 500 ma/USB POWER Accessories Available: housing,hansfree,charger,battery, ... silicon protector,screen protector,usb data cable, memory card, card reader,holder and ...