The NDI-04H-V is a momentary tactile switch manufactured by Diptronics. It is a single-pole, single-throw switch with a 4.5mm x 8mm rectangular top actuator. It has a clear point of tactile feedback, 50mA rated current, and a standard operating force of 0.36N. Its mechanical life is rated at 200,000 cycles. The switch is RoHS Complaint and is lead-free and halogen-free. It also has dustproof, waterproof and oil-proof characteristics.