Put your testers in the spotlight with this proving unit from Megger. It's a two-pole voltage source that verifies the accuracy of your electrical testing tools. This lets you know your kit's up to par, so you can check circuits with confidence. For versatility, the device generates a wide voltage range between 50 and 690V in five steps. LEDs clearly indicate when each stage is complete to take the guesswork out of monitoring. As it weighs in at only 346g, this portable gadget is a breeze to handle.

• Works like a charm in harsh environments, thanks to a wide operating temperature range between -10°C and +40°C
• LED status indicator shows when batteries need replacing
• Compact size of 130 (L) x 48 (W) x 68mm (H) to fit easily inside your toolbox

• Electrical engineering
• Medical equipment testing
• Automotive manufacturing
• Power installations

The device switches on and off automatically, so there's no need to fumble around for a power button. Simply insert the probes, and it turns on.