The perfect tool for checking the polarity of mains adapters. Simply plug and it will already indicate the polar-ity. Prevents damage to devices by wrongly polarized mains adapter.
Features:
- Width: 40mm
- Height: 60mm
- Height: 15mm
- Led screen
- Connectors: 3.5 / 1.35mm, 5.5 / 2.1 (low voltage plug) and 3.5mm (Jack plug)
- Maximum voltage: 3 - 15V