ES001-R5M has EXTRA-long 5 feet leads & 2 SUPER strong magnets. Professionally made with the highest quality new parts, 100% ready to use right out of the bag and designed to check for continuity. Made for electrical professionals to work on non-energized single and multi-conductor cables, no matter how long they are. Simply clip one phone on each end of the wire to check. Communicate two people loud and clear, no noise or interference. All sets include heavy-duty on/off switch, SUPER bright LED light (that lets you know when continuity is complete), 12v internal battery, velcro ties to secure kink-less wire leads, and a heavy-duty tool storage bag. ***WARNING/CAUTION/DANGER: ***Do NOT use on LIVE circuits or energized wires of any voltage. Misuse may result in serious injury or death. We are NOT responsible for any misuse that leads to personal injury, property damage, damage to the phones or any other equipment of any kind.