Item Type: Mini Electric Linear Actuator Material: Aluminium Alloy Working Voltage: DC12V Stroke: Approx. 30mm / 1.2in Distance Between Two Installation Centre Holes: Approx. 85mm / 3.3in Noise: 55dB Maximum Waterproof Grade: IP54 Application: Smart smoke extractor, window opener, robot, home automation. Package List 1 x Mini Electric Linear Actuator 2 x Mounting Rack 1. Before use, confirm whether the motor voltage is correct. 2. Do not store or operate in a high temperature or humid environment, and do not place it in corrosive gas, which will reduce the efficiency of the motor. 1Can be used in agricultural machinery, construction, cleaning and sweeping vehicles, ships and so on. 2Can replace hydraulic and pneumatic products and is an ideal choice for saving energy consumption. 3The smooth and safe operation has low noise, when it reaches the top, it will stop automatically. 4Has overcurrent protection, short circuit protection, overload protection and overvoltage protection. 5Premium aluminium alloy material with IP54 waterproof grade ensure great durability for long use.