The CLAMP-GUN™ M12™ Cordless LITHIUM-ION Clamp Meter is a heavy duty True-RMS current tester for professional commercial and industrial applications. Powered by the Milwaukee M12™ REDLITHIUM™ battery, the 2239-20 features an ergonomic pistol grip design which greatly increases comfort and ease-of-use in overhead applications. The unit also provides a wide 1.57" jaw opening to easily handle very large conductors, a thin jaw profile for access to tight spaces, a large white on black display, embedded non-contact voltage detection and embedded extra bright LED Floodlight. The 2239-20 model is a bare tool sold without a battery or charger and is covered by the Milwaukee 5-Year Warranty.