Officially licensed LEGO Heart Keychain Light with LED light. Use your own LEGO elements to decorate this fun accessory! BATTERIES: Uses 2 long lasting CR2025 3V batteries- INCLUDED. Batteries are replaceable. SIZE: Measures approximately 2 inches / 51 mm tall. USES: Key ring for easy attachment to backpack, purse, or set of keys. Fun gift for Valentine's Day, Mother's Day, Father's Day, or to shower someone with love. ACTIVATE THE LIGHT: Press and hold the sensor to activate the light. Light does not stay on unless sensor is manually pressed. Makes a great gift for fans of LEGO!