This is a smart cup mat for . No need of wiring and installation, can work if placed into the cup slot After being turned on, the cup holder pad can be switched to various colors by pushing the button at the bottom of it. Features -Color: Assorted Color -Material: Acrylic+ -Size: 6.80X6.80X1.50cm/2.67X2.67X0.59in - decoration atmosphere lamp mat, delicate and . -Press to between blue, red, white, green, yellow, purple and ice blue. -Full power can be used normally for about 15 days. -Shiny designs are beautiful and you can be in a good mood. -It's a great friends and family for cup holding. Specification Applicable Model: All Installation Position: Interior Cup Supply: Built-in Charging Battery 150MAH Luminescence condition: In the dim environment, vibration activates to be luminescent for 25 seconds Sensor: light sensor + vibration sensor Package list: 2 x Coaster