Review on 🚀 Unlock Performance: Experience the 3571-JL Superchips Flashcal by Mike Newbill

First off, the shipping is insanely fast. I didn't expect to receive my order 2 days before the estimated arrival date. Secondly, the product looks brand new in its original packaging, all sealed in the bag and with no sigh of having been used before. Thirdly, I bought it mainly to calibrate a tire speedometer and this device really did its job, how accurate is it? I don't know because it's impossible to match my Jeep's current speed with a GSP speed tracker and I also don't know how accurate the GPS speed tracker app is. Fourth, Superchip devices have many options/functions, but most of them DO NOT DO ANYTHING or CANNOT WRITE a new selection option/function for my 2019 Sport 2 Doors JL.