Quartz mini alarm clock TFA Dostmann 60.2039.10 with temperature and humidity switch, battery AAA, rectangular black/grey

The Quartz mini alarm clock from tfa dostmann is a compact bedside and travel clock with an aluminium-look rectangular housing in black and grey. It shows time and includes an alarm function while also measuring indoor temperature and relative humidity. The small footprint and lightweight design make it easy to place on a nightstand, carry in luggage, or mount on a wall. Power is provided by a single AAA 1.5 V battery (not included).

Advantages

The clock combines basic timekeeping with climate monitoring in a single compact device, allowing quick checks of room temperature and humidity alongside the time. A button lets you switch the display between time and climate or set an automatic alternating display. The display also provides recall of maximum and minimum temperature and humidity values, which are reset automatically at midnight. Its small dimensions and low weight make it suitable for travel and tight bedside spaces.

Suitable for

• Bedroom nightstand where a compact alarm clock and basic climate info are needed
• Travel use in a suitcase or carry-on due to lightweight, compact design
• Small rooms where monitoring temperature and humidity helps maintain comfort
• Mounting on a wall when bedside space is limited

When it may not be suitable

This device provides basic indoor temperature and relative humidity readings but is not intended for precise scientific measurement or professional HVAC diagnostics. It runs on a single AAA battery and therefore may not be ideal for users who prefer mains-powered devices or long-term unattended operation without periodic battery replacement.

Key specifications

• Functions: time display, alarm, indoor temperature, relative humidity, max/min memory
• Housing: rectangular plastic with aluminium appearance, black and grey finish
• Power supply: 1 × AAA 1.5 V battery (not included)
• Dimensions: approximately 84 × 25 × 38 mm
• Weight: approximately 36 g
• Display modes: manual toggle between time and climate, or automatic alternating every 5 seconds

How to use

Insert a single AAA 1.5 V battery in the battery compartment, set the current time and alarm according to the control buttons, and place the clock on a flat surface or hang it on a nail. Use the display button to switch between time and room climate readings or select the automatic mode to alternate displays at 5-second intervals. Press the button to view maximum and minimum recorded temperature and humidity values; these values are reset automatically at midnight.

What to consider before purchase

• Requires a standard AAA battery which is not included
• Provides basic indoor climate indication — not a precision instrument for scientific use
• Small size and lightweight design suitable for travel and limited space

Usage recommendations

For a comfortable sleeping environment aim for room temperatures around 16–18 °C and relative humidity between 40–60 %. Use targeted heating or ventilation if readings fall outside this range to improve comfort and reduce the risk of mould.