HPM Door Chime Extra Bell Press SKU: 109247 MODEL: D641/BPCC Error. try again later You've successfully joined the club $ 22 .99 each Mitre 10 SAvailable at selected stores. Check your local store for details Variants Additional bell press. Suits all HPM D641 Series Door Chimes. Battery operated, easy to install, totally portable, no wires or cables. Features and benefits Easy adjustment of channel selections to aviod interference. Also able to be used as a pager or panic switch. Choice of two chime tones: Ding Dong or Westminster.