The Cellphone-Mate Surecall Flex2Go 50db Repeater Kit is a mobile cellular amplifier. This includes everything you need to boost cellular signals in a vehicle or RV. The coverage range of this kit is from 3' to 10' depending on the signal outside the vehicle. The kit in the video is the Voice/3G model, and there are 4G LTE models also available. For more information visit http://5Gstore.com/Flex2Go