Description: 100% safe and reliable. Automatic temperature control under 38℃. Material: ABS + PU. Size: 16 x 2 cm. Cable length: 90 cm. Feature: 1. Fast heating — reaches operating temperature in approximately 4 minutes. 2. Designed to match human body temperature for comfortable, natural warmth. 3. Fully waterproof (IPX7-rated). 4. Intelligent automatic temperature control and heat preservation: Built-in temperature sensor continuously monitors surface temperature; heating automatically stops when reaching true body temperature (~37℃), and resumes only when temperature drops below that threshold — similar to an air conditioning system for precise thermal regulation. 5. LED indicator flashes during charging to provide clear status feedback. 6. USB-powered with low-voltage design — safe, energy-efficient, and convenient for everyday use. Package included: 3 × LED Heating Rods Note: 1. Slight measurement variations of 1–2 cm may occur due to manual measurement. Please confirm this is acceptable before purchasing. 2. Product images are representative; actual color may vary slightly due to lighting conditions during photography and screen display differences.