Features:

• Compact portable power source that provides 400 watts AC power
• Use to jump-start vehicles, charge and operate electric devices, inflate tires
• Rugged plastic casing; includes sealed, non-spillable AGM battery
• Includes jumper cables, nozzle adapters for pumping air, AC charger, DC charger cable, accessory bag
• Measures 5.9 x 4.1 x 2.2 inches; weighs 2.4 pounds; 1-year warranty

Editor Reviews:

Product Description:
The rechargeable XPower Powerpack 400 Plus delivers 400 Watts of portable AC power that can jump-start vehicles, while its integrated 250 PSI air compressor can inflate tires. Runs 115V AC or 12V DC products anywhere, including cell phones, camcorders, laptop computers, 13in. TV/VCRs or power drills. Powered by a rechargeable sealed, nonspillable 20Ah AGM battery that can deliver 200 cold-cranking Amps. Includes a built-in 400 Watt inverter, one 12V DC socket outlet and two 120V AC socket outlets, built-in emergency light, 2ft. jumper cables and AD/DC charging units. Overload and overheat protection. For outdoor and indoor applications.

Rating : - Good device, with limitations
I bought this for emergencies and for it's multiple uses. Somehow, I have needed almost all of it's features since I purchased it. Let me review each;

Jump starting a car: Worked flawlessly and repeatedly. We had a minivan that was used quite infrequently and had a dead battery in it. One thing to note: the jumper cable is fairly short. We had to have a stool or someone holding the unit to jump start the vehicle. It did not reach from the bumper to the battery.

Powering a portable DVD player/DC: It worked well and gave over 2 hours of play. It probably could have provided more.

Powering laptop & Air mattress pump(AC): Used briefly with laptop without problem. The air mattress pump worked well off the plug and was used repeatedly on the campsite. It made a very convenient combination. The drain on the battery was negligible.

Light: Too heavy for a flashlight, but good for lighting up an area or room during a power outage. Easier to remember where this was put and batteries didn't need to be checked. Surprisingly useful, even at home.

Compressor: The big let down. The air compressor gets hot pretty quickly. This is perfectly fine if you are topping of a slightly flat tire or inflating a basketball, but I would not trust this to inflate a real flat or anything large. I'd rather buy a cheap compressor and plug it into this thing. This is perhaps the weakest link in the device and that seems to be correspond with other reviews.

All in all: a fine portable power unit with multiple uses. It's a nice tool for a vehicle, camping or in an emergency. Read the instructions and warnings before use. This isn't intended for use with all electric devices.