Total Length: 67mm / 2.6"; Floating Ball Size (Approx): 24 x 23mm / 0.94" x 0.91" (L*D); Thread Diameter (Approx): 10mm/0.39"; Cable Length: 40cm / 15.7" Maximum Switching Voltage / Current: DC 110V / 0.5A HOW TO WORK - Using a magnet to detect the switch at blades.The float switch is mainly composed of a magnetic spring switch and a float.There are magnetic materials in the float.When the float rises and falls with the water level, it will touch the magnetic spring switch for detecting liquid position WIDE APPLICATION - The float switch can be used for water heating equipment such as water dispenser, water heater, humidifier, etc. It can also be used for water tower, drainage pool, water tank, culture pond, etc. PLEASE NOTE - As the current that the switch can carry is very small (0.5A), you must use a relay or contactor when connected by a load, the relay or the contactor are not included here.