An alert band that notifies you with sound and vibration for heatstroke prevention. I bought this last year for my parents and myself, but it remained unused and stored. Temporarily opened for photography. - Product Name: Heatstroke Alert Band - Function: Notifies of danger with color, sound, and vibration - Waterproof Rating: IP67 - Size: 25×74×10.5mm - Battery: 110mAh rechargeable - Auto-adjustment function: 15-second auto-adjustment Thank you for looking.