1. Operating circuit rating: 4V ~ 6V, 35mA 2. Insulation resistance: 20m ohm or more at 25V DC 3. Dielectric withstand: 250V RMS (50 ~ 60Hz 1min) 4. Contact bounce: 30ms or less 5. Actuation force: 15 ~ 150g 6. Life expectancy: 5,000,000 closures 7. Surface hardness: 3H or more 8. Light transmission: 75 ~ 90% 9. Operating temperature: -10 ~ +60 C deg 10. Storage temperature: -20 ~ +70 C deg 11. Humidity: 90 ~ 95% (40 C deg) for 240h