| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
1.Photo interrupter module and a digital interface, built-in 13 LED build a simple circuit to produce photo-interrupter warning lamp 2.It comes with digital interfaces of the LED, the light blocking access number 3 sensor interfaces, sensing when the light Interrupter device senses a key signal, LED lights, otherwise off.
