V-CHECK for MV-TAG and MX-TAG or other capacitive detector*. The proving unit allows you to make sure your MTAG, or other capacitive detector, is working properly when no ‘’known real voltage’’ is available. If voltage is not available, you can use V-CHECK to test the voltage tester before and after the no-voltage check. This product increases the safety of the user but does not replace the built-in self-test that MUST be done before and after using your voltage tester. Nor does it replace a periodic check of the ignition voltage. Delivered in a soft bag. *V-CHECK works on MV-TAG, MX-TAG, TAG330, TAGSL200BV, TAG200BC and UNITAG Technical data Drive system with 1 x 9V alkaline battery Operating temperature: -25°C to +55°C Size: 123 x 72 x 49 mm Weight: 228 g (without battery).