*Offer valid for 1 Whistle Health Limited Edition device and a subscription to the Whistle app for as long as the user is part of the MARS PETCARE BIOBANK™ study. Offer while supplies last on whistle.com. Offer is non-transferable and only valid for MARS PETCARE BIOBANK™ recipients. Not valid on previous purchases. You are not required to provide credit card information unless you decide to continue your subscription beyond the expiration of the MARS PETCARE BIOBANK study project. Whistle may modify or cancel offer at any time.