Total Tester :4x190mm

It sounds like you’re asking about a Total Tester 4x190mm. This is likely a voltage tester, sometimes called a test pen or circuit tester.

Here’s what I can tell you about it:

• Purpose: A voltage tester is a tool used to determine if there is electricity present in a wire or circuit. It’s an essential tool for electricians and anyone working with electrical systems.  
• How it works: The Total Tester 4x190mm likely has a small neon bulb or LED indicator that lights up when it detects voltage. You touch the tip of the tester to the wire or terminal you want to test, and if the light illuminates, it indicates the presence of voltage.  
• 4x190mm: This likely refers to the dimensions of the tester. The “4” probably indicates the width of the tip (in millimeters), and the “190mm” is the overall length of the tester.
• Total: This is the brand of the tool. Total is a company that makes a variety of tools, including electrical testers.  

Key features to look for in a voltage tester:

• Voltage range: Make sure the tester can detect the voltage levels you need to test (e.g., household voltage, industrial voltage).
• Safety: Look for a tester that is insulated and designed to prevent electric shock.
• Ease of use: The tester should be easy to hold and use, with a clear indicator light.
• Durability: Choose a tester that is made from durable materials to withstand regular use.