1 Wired ding dong &music doorbell. 2 Model design,good finish,high quality 3 Certificate:CE ... .Main type:WT-9 Ding dong doorbell AC110/220V YW-307 DC3V KD-2 KD-3 Music door bell AC110/220V DC3VWT ... , plug, light, knife switch, connector, fuse, porcelain insulator, spindle, cable, doorbell, test pen, etc. And most of our products have obtained ...