1-year battery life - no recharging needed!
24/7 wearability - swim-friendly with 5 ATM water resistance.
Kid tough - easy to put on, the 1-size-fits-most, nonstaining, 1-piece band stretches over your child's hand and fits comfortably.
Ages 4-9 years; Bands: Regular size accommodates wrists up to 145 mm; X-large fits wrists 146-170 mm. vvofit 3 bands are compatible
Compatible parent mobile app - free app includes fun and educational mobile adventures for kids and chore/behavior management for parents; OS compatible Android 4.4 and above with Bluetooth 4.0 or greater or iPhone OS version 9.1 and above