This thermometer hygrometer features an easy-to-read electronic ink display, a 1-year replaceable battery, and precise temperature and humidity readings. It is compatible with both iOS and Android devices and can be used to monitor temperature and humidity in various rooms of the house. Price drops from $16.99 to just $11.89 when you clip the 30% off coupon on the product page. Shipping is free for prime members or on orders over $35.

Clip the 30% off coupon.