beer drining plastic led coaster material:ABS size:100*10mm 2*CR2016 battery,CE,RoHS approval logo print welcome beer drining plastic led coaster1. size:100*10mm2. material: ABS3. CE,ROHS approval4.various flashing coaster available 5.flashing when cup on it, power saved model6.Firm packing for transportation 7.logo imprint available8.with 2pcs led lights beer drining plastic led coaster