Bus Smart dongle is two products in one:

no electronics or mercury

Type ECS can be used to control single or twin engine applications from up to four control stations

gas dampened height adjustment

Light Source: 2 x Power LED

Vetus CABLF80 - Low Friction push/pull cable, length 8 m Victron Energy Bus Smart dongle is twoThis high quality push pull cable uses a multi strand wire core for superb strength and flexibility. The core is provided with a ribbed synthetic sheath, ensuring that contact with the outer casing is kept to a minimum. Therefore, LF type cables are therefore ideal for long and complicated runs and for dual station installations.