One essential tool for Better humidity & VPD control: the 12L/Day Dehumidifier for removing excess moisture. 6L SmartHumidifier:6L large capacity for up to 38 hours runtime, ideal for 1.5m×1.5m grow spaces. Features temp/humidity sensing, iControl integration, and WiFi/app remote control for precise humidity management and healthier plant growth. 15L Auto-Refill Kit:15L food-grade reservoir compatible with multiple devices. Mechanical float valve auto-maintains water level, preventing leaks/overflows. Tool-free setup. ⚠️Only compatible with Mars Hydro 6L humidifiers with removable top caps. Please note: This order will be shipped in two separate packages. Package 1: 1 x 6L humidifier, 1 x Temp & Humidity Sensor, 1 x flexible long hose, 2 x flexible short hose, 2 x Velcroes, 1 x 2-way nozzle, 1 x tool kit; Package 2:1x Collapsible Bucket (capacity 15L), 1x PE Pipe (Overall Length: 5M), 1x 1/8 Inch L-shaped External Thread Elbow, 1x T-shaped Connector, 1x Bucket Connector, 1x L-shaped Tank Connector, 1x L-shaped Double Connector, 1x Float Valve, 1x On-off Valve, 1x Pipe Cutter