Cool equipment accessories tail light

Product: 4led red and blue bead high brightness tail lamp
Power supply: use two 2032 button batteries
Mode: the first red blue cycle flash, the second red and blue slow flash, the third
It's always on. It's off four times
Product features: bright red and blue lamp beads, more eye-catching and gorgeous; adjustable base
The tail lamp can be placed horizontally or vertically in various forms