Perfect for birthdays, Christmas presents, and more ♡*・ Product Details Size Body: Approximately 4.2cm wide x 1.2cm deep x 4cm high Wrist circumference: Approximately 13-18.5cm Package: Approximately 5.5cm wide x 4.3cm deep x 13.7cm high Approximately 41g Materials ABS, PU ● Displays time, date, and day of the week ● Alarm and snooze function ● Hourly chime function ● EL backlight ● Battery: CR2025 ● Battery life: Approximately 2 years from the time of inserting a new battery ● Monitor battery included at the time of purchase ● Average monthly difference: ±45 seconds ※ Not water-resistant.