Monster Cable Home Theatre Reference PowerSource HTPS 7000 (Discontinued by Manufacturer) 270 analog voltmeter for instantaneous monitoring of power fluctuations. Sequenced AC power turn-on and turn-off for equipment protection and overload prevention. 3145 joule rating provides highest level of surge absorption. Programmable switched and un-switched outlets. Tri-ModeTM circuitry with audible alarm and auto disconnect provides the most comprehensive power protection.