EDIT 3/4/2025: I contacted the seller and they informed me that this unit does have surge protection rated at 1200J! So cruise ship travelers beware!This seems to be a pretty good compact charger but only time will tell on longevity. I love the fact that it's got 6 USB charging ports, 4xUSB-C and 2xUSB-A and serves as a dual AC port power strip! (NEMA 5-15p ports). It doesn't take up that much room in my backpack as this just replaced quite a few standalone charging bricks I was carrying along with an individual power strip.As you can see from my pictures, I'm testing it's charging capability with an Asus A16 F617NT, the charging cable being used is a UGREEN 240W rated USB C to USB C cable that measures 6.6 FT in length. While charging the laptop the unit did deliver close to 100W as measured by the USB power meter, I was getting 90W while charging the unit (meter connected at the laptop receiving power from the charger) while consuming roughly 121W according to my Kill-A-Watt unit.The unit does get pretty toasty at 125F around the left area right beneath the logo, and the USB-C charging cable did get a little hot as well measuring at roughly 95F at the end connected to the charger, and roughly 88F at the laptop end. I'm not sure if the 10w power loss is just based on inefficiency of the device itself, something with the E-Marker chip on the cable, or a combination of the device and the long charging cable. (I have no way of testing if the 240w rating of the cable I'm using is true as I have no other devices that can draw higher than 100W)Overall it seems to be decently built. My unit does have a small "click" on the casing when you grasp and hold it, like the plastic was not pressed in all the way on one side when it was assembled, but it doesn't seem to affect it's function or aesthetics. Power cord shows ETL and the casing shows FCC certification stamps. And before I forget, the power cord is 57" long and it is very malleable so is very easy to wind up and put away. My unit did not come with any markings on the ports likes others have posted, so just know that C1 is the port opposite to the ending USB-A port, C1 will be your 100W port. The back of the unit has a cheat sheet for the power distribution when multiple ports are used to charge devices which is pretty useful to know where to plug what in.One final note: This unit's specs are not quite properly portrayed. The image description of the item shows it as a surge protector, but the unit doesn't have a joule rating or any other marking stating it's a surge protector and the actual text description of the item doesn't state it either. I would not use this if you travel on a ship and recommend you use a unit that explicitly states it is not a surge protector for those kinds of travels.