1. Fast heating: The pocket USB heater heats up in 3 seconds and reaches optimal warmth within 30 seconds, maintaining a consistent temperature range of 45 - 60 degrees Celsius to keep you warm. Ergonomically designed for comfort, it fits easily in the palm of your hand and can be conveniently carried in your pocket.2. Temperature display: Upon powering on, the device displays the current temperature—60°C for high heat and 45°C for low heat. It features a built-in 3000mAh lithium-ion battery for extended use. The heater can be charged via power banks, vehicle chargers, or other standard USB power sources, ensuring reliable performance on the go.3. Compact and portable: This rechargeable hand warmer is small and lightweight, making it easy to carry and use without taking up much space. Its compact design allows for comfortable handheld use and effortless portability. Product dimensions are approximately 99mm (3.9 inches) in height and 40mm (1.6 inches) in width.4. Gift option: This electric hand warmer makes a thoughtful and practical gift for family and friends, offering comforting warmth during cold weather. With a sleek, modern design, it is both functional and stylish, suitable for everyday use at home, in the office, or while traveling.5. Soft-touch finish: The side arms are made with a soft, durable material that provides a comfortable grip and pleasant tactile feel when held or carried in a pocket. Rechargeable and versatile, it is ideal for use at home, in the office, during travel, at school, and more. Choose this stylish and effective hand warmer for reliable warmth wherever you go.Specifications: - Product Type: Electric Hand Warmer - Material: ABS, Aluminum Alloy - Battery Type: Built-in Lithium-ion Battery - Battery Capacity: 3000mAh - Height: Approx. 99mm / 3.9 inches - Width: Approx. 40mm / 1.6 inches - Extension Arm Size: Approx. 65mm / 2.6 inches - Maximum Distance Between Arms: Approx. 79mm / 3.1 inches Instructions: 1. Press and hold the power button to turn on the heater. Once activated, press the button to switch between two heat settings: 60°C (high) and 45°C (low). 2. Use the USB charging cable to connect the device to a power source via the input interface to recharge.Package Includes: 1 x Electric Hand Warmer 1 x Charging Cable