Heath Zenith Piezo Door Chime Color:Black/White round shape means each tooth

round shape means each tooth cuts uniform equal amount of wood

The enhanced waterproofing wood protection can be used to stain your deck in hot and cool temperatures

This compact machine for home use has a forward and reverse function to help prevent jamming

Compatible with most chemicals commonly used to treat pools

with rectangular box

Heath Zenith Piezo Door Chime Color:Black/White round shape means each toothChime plugs into any standard wall socket Simply pressing the button generates the energy to activate the chime. No batteries needed. Adjustable Volume Control 6 Chime options (Ding Dong, Westminster, Whittington, Auld Lang Syne, Beethovens 5th, Relax) Up to 200 ft. transmission range Battery free push button included LED indicator Chime mute capabilities FCC and IC Certified: Yes Warranty (Yrs): 1