The Extech EX310 mini digital multimeter is a compact, ruggedly designed multimeter including a non-contact voltage detector in order to detect the presence of AC voltage before testing. The EX310 features manual ranging and battery test for 1.5V and 9V. Basic accuracy is ±0.5%. Other features include low battery indicator and large, easily readable 1" digits. The EX310 weighs just 9 oz.