Timeguard-TR644top 2-4-Channel-16A-Digital-Timeswitch-Timeguard-TR644top 2-P-The-Timeguard-TR644top 2-4-Channel-16A-Digital-Timeswitch-has-been-designed-to-provide-the-installer-with-economical-solutions-to-domestic-installations-from-a-minimum-of-components-The-Timeguard-TR644top 2-is-a-24-Hour-7-Day-Yearly-Single-Channel-3-Module-16A-Digital-Timeswitch-with-800-memory-locations-P-Timeguard-TR644top 2-4-Channel-16A-Digital-Timeswitch