Small compact design allows you to carry the clock with you everywhere you go. Chain with clip is provided for easy attachment to belts, pocketbooks, backpacks, etc. You can choose a beeping or chirping sound. Hourly time and temperature report. Requires 2 LR44 batteries (included). 12/24 hour display. Numbers on clock measure 1/2in in size. Temp display meas. 1/4in in size. Unit measures aprox. 3in Length x 1/2in Width x 2-1/8in Height. 12 hr. speech only. Temperature in Fahrenheit.