The OdorStop OS1260 12/3 SJTW Yellow Extension Cord is a Professional Grade 15-Amp cord with blue LED lights in both ends. It is engineered to be more flexible in cold temperatures and resistant to oil, grease, moisture and abrasion. Blue LED lights in both the plug and receiver end enable user to verify that the electric is on from either end of the cord. This is especially valuable if the cord is run into an attic or basement where the receiver end is not visible. High Visibility Yellow color helps eliminate trip hazards. It is UL listed and rated for heavy duty use and meets OSHA specification. OdorStop (R) brand is a registered trademark.