1. Fast heating: The pocket USB heater warms up within 3 seconds and reaches optimal temperature in 30 seconds, maintaining a consistent heat output between 45°C and 60°C to keep hands warm. Ergonomically designed for comfortable handling, it fits easily in the palm of your hand or inside a pocket. 2. Temperature display: Upon powering on, the device displays the current temperature setting—60°C for high heat and 45°C for low heat. Built-in 3000mAh lithium-ion battery provides extended usage time. Compatible with various power sources including power banks and vehicle chargers for convenient recharging. 3. Compact and portable: This lightweight, rechargeable hand warmer is small in size, measuring approximately 99mm (3.9 inches) in height and 40mm (1.6 inches) in width, making it easy to carry and use anywhere. Its portable design allows for convenient storage in pockets or bags. 4. Gift option: A practical and thoughtful gift for family and friends during colder months, offering warmth and comfort. The modern, headphone-inspired design adds a stylish touch, making it suitable for everyday use at home, in the office, or on the go. 5. Soft-touch finish: Features soft-touch side arms made from safe, flexible materials for a comfortable grip and pleasant tactile feel. Rechargeable and versatile for use during travel, at work, school, or at home. Ideal for anyone seeking a reliable and attractive personal heater. Specifications: Type: Electric hand warmer Material: ABS plastic, 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 length: Approx. 65mm / 2.6 inches Maximum earcup distance: Approx. 79mm / 3.1 inches Instructions: 1. Press and hold the power button to turn on the device. Once activated, press the button briefly to switch between two heat settings: 60°C (high) and 45°C (low). 2. Connect the charging cable to the input port to recharge the device. Package includes: 1 x Hand warmer 1 x Charging cable