【Built-in WiFi App Control】Smart app controller with programming temperature and humidity, fan speed, timer and alarm system. The controller features precise temperature and humidity sensors on a 2.5m long wired probe. 【three-phase EC motor Quiet and Energy】The energy saving is very good: three-phase EC motor with mixed flow rate and PWM control can use precise electronic pulses. This allows the built-in fan to operate more quietly and reach low speeds without generating noise or heat. The energy efficiency of three-phase EC motor is also twice as high and can save up to 40% of energy costs and recover costs in the long term. 【Parameters】Tube diameter: 150 mm, air flow: 689 m³/h(405 CFM), power: 60 W, noise level: 32dBA, Rotation: 3000 rpm , IP44. Stable performance: By using three-phase motors, the working efficiency is more stable. Even if the pipe is longer than 10 meters, the duct fan can work normally without reducing the power and air volume. 【Wide Application】This inline duct fan is used in indoor plants and vertical farming, heat transfer and cooling, commercial drying and air filtration. Our online fan can also create a pressurized environment, simulate wind, smells and smoke, and exhaust fresh air from outside. 【WARRANTY】100% refund or free replacement if quality problems within one year. Please do not hesitate to contact us with any technological issues or other comments. We reply within 24 hours.