Ultra powerful 5 ports USB charger up to 40W, is able to charge 5 tablets or smartphones. Turn one outlet into eight with the surge protector Its beautiful chassis made of PC & ABS plastic material makes it fireproof of up to 750?. 15000A max and 1700J surge-suppression rating,the unit transfers optimal power and helps keep plugged-in devices safe, especially during storms and power outages. Aerocool's multi protection safety system ensures complete protection from electrical short circuit,over heat, electric surge, over charging, over current and etc.