One used Neptune Systems Energy Bar 4 (EB4).

It is compatible with the Apex Classic and Apex Systems.

Features:

The EnergyBar 4 module features 4 independently controllable outlets. With power failure detection, active electrical current monitoring, and failsafe features make this power bar far better than any competing units.

• 4 independently controllable 120V Outlets (3 outlets @ 8 Amps, 1outlet @ 12 Amps, total current must be less than 15 Amps)
• Plug and Play
• Built-in 4 Port hub so that accessories can be easily added
• Active electrical current monitoring and logging
• Fail-safe features. On communication failures outlets revert to user settable default settings
• High reliability direct wired connection to the Apex System (does not use X10)
• All four of the outlets use mechanical relays for switching
• Up to 240 EB4s can be daisy chained together for up to 960 switched outlets
• Built-in circuit breaker Protected
• 4 Mounting Holes for easy installation
• Compact custom aluminum enclosure (7.5″ x 3.75″ x 1.8″)