Reading times vary by model: quick-read units can return an underarm result in about 8–10 seconds, while others take roughly 30–60 seconds.
Most models are multi-use and explicitly support oral, rectal and underarm (axillary) measurements.
Battery types vary by model and include LR41, CR1220, CR1632 and CR2032 cells.
Common display features include large LCD screens, backlighting on some models, visual fever indicators (color-coded or fever bars), and memory recall of the last reading.
Care instructions vary: many recommend spot- or wipe-cleaning the probe, some allow rinsing, a few mention waterproof tips or housings, and at least one cautions against fully submerging the unit.
Common included items are batteries, a protective or carrying case, and disposable probe covers on some models.
Listings vary: some are labeled “All Ages,” others specify infant ranges like “0–6 months,” and several are marked “Newborn and up.”