2 Pcs LED Car Cup Coaster

This built-in vibration and light sensor LED car cup holder mat pad is ideally for drink bottles when driving in the dark. They are made of acrylic plastic surface with a built-in lithium battery for charging. Press the red button on the back for 3 seconds to turn on/off. This car coaster will only light up in the dark with a slight vibration and automatically turns down in 15 seconds. Its a perfect decoration automobile ambient lamp and light up a logo when you drive in the dark. 2.66666666" L x 2.66666666" W x 2/5" H