I took to start a completely discharged battery (65 a / h, gasoline engine 2.4 l 160 l / s, under temperature conditions -1 C). Used immediately after purchase without recharging. The car started on the first try with no problems. I didn’t use other functionality, lovers of different chips will find something to do (there are a lot of adapters in the kit, there is a built-in flashlight). I am quite satisfied with the result of the purchase, since the problem was solved. How functional it is at sub-zero temperatures - I can’t say anything yet.