HTC-2 Indoor/Outdoor Temperature/Hygrometer - Digital Temperature and Humidity Sensor for Home - Portable with Time Display - Suitable for Temperature and Humidity Monitoring Graduation Necklace or anyone with hand mobility

or anyone with hand mobility issues

stone and concrete etc

keys and cards with inner pocket

They are also dishwasher safe (top rack recommended)

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HTC-2 Indoor/Outdoor Temperature/Hygrometer - Digital Temperature and Humidity Sensor for Home - Portable with Time Display - Suitable for Temperature and Humidity Monitoring Graduation Necklace or anyone with hand mobilityHow to use the thermometer and hygrometer: Follow the instructions on the back of the device to open the battery cover, remove the battery compartment, and then replace the battery cover. The humidity sensor is now ready to use. Indoor thermometer button functions: (Mode) Switches between clock and alarm display setting the current time, 12 hour or 24 hour alarm. Adjusts the values of the settings according to the time and date. (Adjust); (Memory)