The Pifco Broxobrush was manufactured in the early 1980's
Manufactured by Pifco (as then) and Broxodent. This is a gem in my collection.

(a) This compact device came in its own cabinet with mirror.
(b) The powerhandle has a variable intensity setting and a tactile on/off switch.
(c) 4 'D' size batteries sit in the back of the cabinet.
(d) The brush handle is connected by a coil flex that stretches up to 2 meters out of the cabinet..