MODEL: 988CS -with 1 wall outlet plug and one twist-lock to fit EDIC equipment MODEL: 989CS - with 2 wall outlet plugs So you've got two power cords and you need to find outlets on different circuits? No problem! Just plug the circuit locator with an extension cord into two wall outlets - the sensor instantly lights up when it's good to go. Use it anytime for any equipment. Prevents potential power overload by taking the guesswork out of locating circuits.