Description 1. This type use Audio control method, Automatic detection light intensity, if the light intensity under 7 Lux, and as long as the voice of more than 52 + 8dB,the lamp will be lighted! After 60 + 20 S later, the lamp will be automatically extinguished! Achieve energy conservation! 2. The light-controlled in switch can detect light intensity automatically! If the light intensity is high, Such as in daytime, the lamp will be out work! Achieve energy conservation! 3. This switch use general 2-lines connection, the same as general switch, simple to use, reliable performance! 4. Need special function can be achieved through 3 lines connecting, such as fire escape lights! Technical parameter 1 .Voltage : 175VAC~250VAC 50Hz 2.operating power :< 100W 3.light time : 60 + 20 S 4.working Sound intensity: 52 + 2dB 5.working light intensity: 6 + 2Lux 6. Working temperature: -20~+50 7. Dimensions: 86mmX86mm