DROK Backup Uninterruptible Power Supply UPS AC 110V-240V to DC 13.5V 12 Volt 7AH Battery Charger 1.5A Input voltage: 110V-240V AC, 50/60Hz Output : DC 13.5V, 1.5A, 18W Dimensions: 90mm x 52mm x 30mm With battery interface, the maximum can be equipped with 12V7AH battery;With UPS function, control battery charging status automatically. Single output, it can switch to battery power automatically as battery detecting, protecting, power cuting;With protections of short circuit, overcurrent, overvoltage .