SEAL SwimSafe Monitor System with Swim Bands Protect your family anywhere around water, swim with confidence Kids love our colorful band LEDS and lightweight design Hub and bands alarm if a swimmer is submerged too long or if a non-swimmer even enters the water Portable system can be taken to the pool, the beach or on vacation System comes with 1 seal swim safe band, 1 swim safe hub and 1 charger, add bands as you need them