
Don't expect anything too high tech. This is a very simple device that takes some getting used to. Once you get comfortable with it and understand how far you need to keep it from the speaker, it will do the job. This unit does not come with a CD, so you'll need to go online and download the audio tracks to do the actual polarity test (which can be a bit tricky to find). Also, the green light for positivity is very dim and you need to work in a darker place or cover it with your hand to see it.

Vgate ICar Pro Bluetooth 3.0 OBD2 Code Reader | Scan Tool For Torque Android To Check Engine Light & Car Faults
19 Review

Autel AP200H OBD2 Scanner Dongle - Wireless Bluetooth Code Reader with Health Status Reports - Diagnostic Tool for Engine, Transmission, ABS, SRS - OLS/BMS Resets - All Vehicles (Android/iOS)
11 Review

Upgrade Your Car Diagnostics With 16 Pin OBD2 Extension Cable Splitter - Male To Dual Female Y Cable - 50CM
17 Review

Autoscanner for car diagnostics Rokodil ScanX Pro, OBD2 scanner
29 Review

Rechargeable screwdriver OA-3,6F (433.0.2.00), 3.6 V, 1.3 Ah Li-ion, blister
46 Review

Xiaomi Mi x Mijia Wiha Precision Screwdriver Set (DZN4000CN), 25 pcs
34 Review

Xiaomi Mijia Ratchet Screwdriver 16 in 1 Screwdriver with Interchangeable Bits, 10 pcs, Black
22 Review

DVR 70MAI Dash Cam Pro Plus+, black (A500S), black
87 Review