Quantity: one piece Blue color Cable length: 1.2m Entrance: 5V/1A Weight: 169g Upgraded version: USB case fan with 5 blades and brushless motor: Produces a strong breeze with less noise (between 20 and 30 dB). Stay cool with minimal noise so you can work, read, or relax without distractions. 3 Speed Control: The fan has 3 airflow speed settings that can be adjusted to suit your needs. The comfortable noise of the first gear is less than 20dB, which is conducive to sleep; natural second gear is designed for work and study; the cool third gear helps you enjoy outdoor leisure. Portable and Small: Small (12.5 x 12.5 x 5cm) exquisite, easy to put in your bag. Weight (0.18kg), perfect for outdoor activities and travelling, or just laying on the table. USB Powered: Equipped with 1.2m long USB cable, compatible with 5V output USB devices, such as computers, laptops, power banks, portable chargers and other devices with USB output. Add summer coolness: USB fan/mini fan/USB fan silent / USB fan / USB computer fan to bring you a breeze and keep you cool, perfect for office, home, dorm, study, library with small space, its also a baby. Ideal for a good nights sleep.