flashing dog 1)Material: soft PVC ,2)Waterproof,3) on/off button on the bottom,4)Battery non replaceable,5)Module replaceable ,6)Wonderful product for keychain, bars, discos and home decorations ,7)Color: different LED colors are available (red/yellow/blue/green/multicolor) ,8)OEM and private labels are welcome,9)high:4.5cm,diameter:4cm LED keychain