Introduction - If you have any usage issues, please Google them yourself
⑴ achieve two adjacent LED light show from left to right order, to the extreme left, then turn right to the left shows that the most right side, and then followed by shows from left to right again and again. ⑵ LED indicator light shows that the top two, they make noise buzzer. After changing the display direction. LED indicator light shows the first time before the first buzzer noise. After the show in order from left to right.