* Rechargeable battery or dry battery dual-use UM-1*4 sets (dry battery is not delivered)* Rechargeable battery 6V4.0AH* Discharge time is about 4 hours (fluorescent tube)/ 8 hours (spotlight)/ 9 hours (flash signal)* AM/FM radio* Power failure emergency function* Spotlight/Flash signal* Volume: 536 (L) * 101 (W) * 135 (H) mm* Package specification: 1*6 sets