Portable, battery-free temperature monitor — no power source or ongoing maintenance needed. Carry it between locations or place it where you need temperature information without worrying about batteries or wiring. Compact, lightweight design with a hanging hole on the back — can be freestanding, hung, or mounted to save space and provide flexible placement options. Ideal for dashboards, walls, cages, or shelves. Simple, reliable function — provides straightforward temperature indication so you can check conditions at a glance. The mechanical design works anywhere electricity is not available. Versatile and family-friendly — useful for vehicles, pet habitats, bedrooms, living rooms and storage areas. One device supports multiple household needs and is suitable for everyone in the home. Helps protect pets and perishables — use it to keep an eye on the environment for animals or temperature-sensitive items, helping you prevent heat stress and spoilage. Use scenarios: In the car: Place on the dash or hang from a visor to monitor cabin temperature when parking or traveling with children, pets or temperature-sensitive cargo. In pet enclosures: Hang inside reptile terrariums or other pet habitats to monitor the living environment and maintain appropriate conditions. For storage and rooms: Keep in pantries, refrigerators with internal hanging space, bedrooms or living rooms to quickly check whether conditions are within a safe range for food, medicine, or comfort. Key attributes at a glance: Function: temperature monitoring without batteries Placement: freestanding, hanging or mounted via rear hole Compatibility: cars, pet enclosures, bedrooms, living rooms, storage areas Size/portability: compact and lightweight for easy relocation Maintenance: no batteries, low-effort use Practical, straightforward, and easy to use — a convenient tool to monitor temperature wherever power-free sensing is needed.