Specialized 3.1 Range Extender Cable Description: This is the essential cable that connects the 3.1 Range Extender with Levo 4. This cable does not come with with the Range Extender, so be sure to pick one up when you buy your 3.1 Range Extender. Features: 210 mm length for all Levo 4 sizes and models. Compatible with 3.1 Full Power system on Levo 4. Extremely well sealed for weather resistance. Required to connect Range Extender to Levo 4.