Calculators; Walkie-talkies; Acceleration sensors; Alarm bells, electric; Baby monitors; Battery chargers for tablet computers; Biometric retinal scanners; Cell phone battery chargers; Desktop computers; Dictation machines; Digital cameras; Digital door locks; Digital notepads; Digital photo frames; Digital telephones; Electric sensors; Electronic book reader; Electronic diaries; Electronic key cards; Electronic pens; Geiger counters; Global positioning system receivers; Hand-held electronic ...