STANDARD FEATURES: • Includes Yellow, Green, Blue wire splice (directionally sensitive) • Includes 4-wire nuts • Wires running from Add-A-Wire accessory are 9” long • Maximum distance for Add-A-Wire using 18-gauge wire is 100ft • Makes one wire work like two • Mounts inside equipment (not for outdoor use) • For use with 24-volt HVAC systems • Cannot be used as “R” power or “C” common wire