Type C interface with a rechargeable battery design, and environmentally friendly One-click testing for simple and convenient operation, improving maintenance and testing efficiency Bee beep prompt with a flashing blue light for instant judgment, eliminating the need to stare at the lights Insulation packaging design that is waterproof, moisture-proof, and oxidation for use Low battery dual reminder with visual prompts to prevent power loss at critical moments, Manufacturer: Ounfhtrttk