Temperature options: This portable hand warmer features an intelligent constant-temperature chip and offers three settings for personalized comfort: low 45, medium 55 and high 65. Night companion: Not only a hand warmer, it also serves as a night light that emits soft illumination, providing warmth and safety for your evenings. It combines hand warming with device charging for versatile use. 2400mAh battery: The built in 2400mAh battery can act as a mobile power source, charging your phone and delivering more than an hour of lasting warmth, making it a two in one heater and charger for cold days. Ergonomic arc design: Made with durable ABS material and an ergonomic curved design, this portable hand warmer offers a non slip, wear resistant grip that fits comfortably in your palm. Use scenarios: Outdoor winter activities Ideal for outdoor commutes, walks or camping where you need steady warmth without bulk. The three temperature options help you stay comfortable while you move, and the unit can power a small device if needed. Bedroom or living space Use as a soft night light to create a warm, safe environment in low light settings. The built in battery provides warmth and the ability to charge a device, adding convenience for late night use. Travel and emergencies Carry it during travel or power outages as a portable heater and charger. The 2400mAh battery can keep you warm while also powering your phone, making it a practical two in one solution for cold conditions.