Made in Gilbert AZ This Bigfoot emergency charging system is brought provides electrical energy on demand. It includes two independent generators connected to a roller which provide twice the capacity of a normal bike generator system. The peak power output capacity is 500 Watts but typical output of an adult non athlete is around 100 to 200 Watts. An athlete can put out 200 to 400 Watts continuous power. The key features of this system are: ● Two generators for twice the capacity modified with air cooled ventilation holes ● Easy setup in 5 minutes ● Able to charge lead acid 12V battery or 24V battery using a blocking diode (diode sold separately on Amazon under ASIN B0025XI9MQ not included) ● Built in power meter that shows Volts, Wats, Amps ● Power adapter cord with XT90 plug that connects into Bluetti AC200 portable power station. ● If you want help adapting this generator to a different connector we will help you with an adapter cable to work with your battery power station solar generator system ● Extra sturdy industrial strength steel roller ● Lifetime warranty for parts (Shipping cost not covered under warranty) ● Excellent for teaching kids about alternative energy electricity for S.T.E.M. in the classroom. ● Great for providing emergency backup power for prepper use