This is the Team Integy Digital LiPo Voltage Checker. This battery checker will allow you to monitor the voltage on 2S - 6S LiPo batteries.
Friday, Jun 7 2019 (about a year ago)
Team Integy Digital LiPo Voltage Checker
I have been using this for a year now and it is just great at reading voltage. It also shows you how far off battery chargers are. Easy to use and would not be without one.