TrolMaster Expander Station 4 (4RS-1) Humidity Controllers or disabled Battery CR2032 3V

or disabled Battery CR2032 3V Li-Ion (1) / ~250 hours continuous use Environment 0 to 50°C

the Bluelab Combo Meter is built for everyday use in real grow environments

If your EC/TDS readings have become unstable

Automatically adjusts climate settings based on your grow lights' photoperiod

Supports most HVAC systems

TrolMaster Expander Station 4 (4RS-1) Humidity Controllers or disabled Battery CR2032 3VTrolMaster Expander Station 4 (4RS 1) High Capacity Power Expansion for Hydro X Controlled Devices The TrolMaster 4RS 1 Expander Station is a powerful 4 outlet expansion module designed for growers who need to control multiple high demand devices through their Hydro X system. Compatible with any TrolMaster plug in style device module, the 4RS 1 allows growers to safely operate up to four independent devicesall triggered from a single module. When the