Get continuous data for days on a single charge with the waterproof* battery pack that's designed to charge your WHOOP while you're wearing it. Do you have an FSA/HSA? Take advantage and save on your 12-month WHOOP membership. Just purchase the WHOOP 12-month subscription with your credit card and submit a reimbursement through your FSA/HSA provider. WEAR YOUR WHOOP WHILE CHARGING: Never miss a moment of data. This battery pack is designed to charge your WHOOP while you're wearing it for truly 24/7 data collection Provides up to 5 days of usage on a single charge WATERPROOF: Capture data continuously - even while in the shower ADDITIONAL INFO: *WHOOP 4.0 is IP68 dustproof and water-resistant up to 10 meters for 2 hours. WHOOP 4.0 Battery Pack is IP68 dustproof and water-resistant up to 1 meter for 2 hours WHOOP 4.0 and membership not included. Purchase your WHOOP 4.0 and membership separately