Xiaomi Mi Multifunctional Digital Clock
I grabbed the Xiaomi Mi Multifunctional Digital Clock on Lazada for S$16.99. It has a 3.7-inch e-ink display and pairs with the Mi Home app, but only if your region is set to China.
digital clock
Digital clocks and hygrometer displays.
ORIA Digital Hygrometer Thermometer Display
I picked up the ORIA Digital Hygrometer Thermometer Display during a Lazada flash sale for S$9.20. It reads temperatures from -10 to 50°C and humidity from 10% to 99%, running on two AAA batteries.