52HZ

Baby monitors; Burglar alarms; Cabinets for loudspeakers; Car video recorders; Computer cameras; Computer mice; Computer peripheral equipment; Earphones; Educational apparatus, namely, manipulative blocks used as teaching aids for the visualization of math concepts; Electronic collars to train animals; Endoscopic equipment for industrial purposes; Integrated circuits; Microphones; Radio sets; Radios; Rechargeable batteries; Satellite receivers; Set-top boxes; Sound mixers; Video baby monitors; Wearable activity trackers