Check the listing for details. Loop Check Phones™ Continuity Test Electrician Phones™ ES001. Condition: New. Listed at 109.99 USD. Choose:ES001-R Dark Red or ES001-B Black handsets Add on options are:5 feet extra-long leads ES001-R5 or ES001-B5 2 super stong magnets ES001-RM or ES001-BMboth 5ft and 2 magnets ES001-R5M or ES001-R5M These phone sets are professionally made in the USA with the highest quality new parts and 100% ready to use right out the bag. Designed to assist electricians with checking continuity and loop check. Made to work on NON-energized single conductor cables 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 with NO noise interference. All sets include heavy duty rotary on/off switch (turn clockwise only to turn on and off), super bright LED indicator light that lets you know when continuity is complete, 12V internal battery, reusable Velcro ties to secure wire leads, kink less leads, carrying case, and email or phone support on how to use. This ad includes drop down choices showing:handset color of dark red or blackANDOptions/combinations choices:ES001-Red (dark red handset color)ES001-Black (black handset color)ES001-Red5' (extra long 5 feet leads)ES001-Black5' (extra long 5 feet leads)ES001-RedMag (2 super strong magnets added)ES001-BlackMag (2 super strong magnets added)ES001-R5Mag (extra long 5 feet leads and 2 super strong magnets added)ES001-B5Mag (extra long 5 feet leads and 2 super strong magnets added) *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.