TS-4000 Multifunction Thermostat Timer Switch A programmable thermostat-timer combo unit that handles temperature control and scheduled switching in one panel. The TS-4000 supports multiple modes: thermostatic on/off with a temperature setpoint, time-based switching with daily or weekly schedules, and a combined mode that respects both. Digital display, push-button menu, and a relay output strong enough for heaters, fans, lights, and appliances. Useful for greenhouses, fermentation chambers, server closets, and aquariums - anywhere you want gear to run at the right temperature on the right schedule without supervision. Why You'll Love It Two Modes In One - Thermostat and timer combined. Programmable Schedule - Daily and weekly setpoints. Digital Display - Read temperature and time at a glance. Relay Output - Drives heaters, fans, and lights. Multifunction - Greenhouse, brew, server, aquarium. Compact Panel - Fits on a wall or in an enclosure.