Where is the gas tank and the 4 stroke engine, as in the product description?

There’s only battery operated, its run on battery pack

Does the car outlet have to be turned on the charge theportable power bank through the car charging port?

The Portable Power Station can Charge a Portable Generator Through an in Car Outlet, And the Charger Is Included In The Package. You can Try It Out, As Each Car Has a Different Internal Structure. Some Require Opening to Charge, While Others Do Not. You Can Try It Out According to Your Own Car.And You Have Any Questions Please Contact Us: pengfengcx@outlook.com

Can I charge a 12v battery

The rechargeable portable battery pack for electrical plugs ac outlet equipped with AC Output: 110V 60Hz, 300W, Pure Sine Wave; DC Output: 12V/8A, 24V/3A; USB-A Output: 5V/3.1A; USB-C Output: 5V/3A, 9V/2A; Wireless charging: 5V/2A. Please make sure your 12V battery is with the matching input. Any further questions please contact us: pengfengcx@outlook.com

How long will it run a box fan that's 75 watts, 120 volts?

The portable outlet power supply could run your 75W box fan for 2.58 hours with a full charge.And you could also calculate the working hours roughly as following:Working hours= fully charged a new one 228Wh *0.85/ the power of your device.And it would vary according to the remaining capacity of battery, the power or capacity of your devices, the temperature, how long it has been used and etc.Any further questions please contact us: pengfengcx@outlook.com

ASIN	B0BN38B5PS
Batteries	18 Lithium Ion batteries required. (included)
Batteries Included?	Yes
Batteries Required?	Yes
Battery Capacity	61600 Amp Hours
Battery Cell Type	Lithium Ion
Best Sellers Rank	#13,168 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #51 in Outdoor Generators
Color	Red-Black1
Date First Available	November 22, 2022
Included Components	12 month warranty and lifetime technical support, 12V car port charging cable x1, AC home charger x1, Portable power station x1, User manual x1
Item Weight	6.2 pounds
Item model number	G300
Manufacturer	Hengke Energy(GuangDong) Co., Ltd
Material	Portable Power Stations 300W
Maximum Power	300 Watts
Part Number	G300
Power Source	AC/DC
Product Dimensions	12 x 7.5 x 8 inches
Special Features	wireless charging, portable handle
Warranty Description	1 Year manufacture guarantee for 300W portable power station

Portable Power Station 300W, 228Wh Solar Generator with 110V Pure Sine Wave AC Outlet, Backup Lithium Battery Generator for CPAP Outdoor RV Camping Emergency Home Use

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