The product adopts integrated circuit and sensitive components controlled by light and sound, having good performance, automation convenience, safe and economic. It is the most ideal automatic switch for such places as hotel, office, family corridor, staircase, bathroom, etc. Function: When daytime or the light is strong, this switch automatically disconnects and locks itself, and sound control does not work. The lamp controlled by this switch doesnt shine. In the case without light or certain darkness, it controls exciter lamp through sound. It can respond to some sound, for example, footstep. It turns on the lamp by connecting the circuit. 1 minute later, it closes automatically. Connect the switch with power supply in multiple as other common sockets. Be careful, this switch cant be installed with electricity; The surface cant be covered by any article, so as not to influence its normal work. Technical Feature: Voltage range: 160-250v The power of load: 25-60w Light sensitivity: 1-5lx lock