Description 1. Precise Timing Control: This innovative USB countdown power-off switch provides accurate control over your devices. It offers a broad adjustable timing range of up to 24 hours, with precise adjustments possible in 1-hour and 5-minute increments, allowing for tailored power management for various applications. 2. Clear Digital Display & Safety: Equipped with a bright digital display, this timer switch ensures you can clearly monitor the remaining time at a glance. It operates through a 5V low-voltage USB input and output, enhancing safety and making it suitable for a wide of USB-powered electronics. 3. Quality Construction & Compact Dimensions: Crafted from robust ABS material, this device is built for everyday utility. The main body measures approximately 7 cm (2.76") x 2.7 cm (1.06") x 1.6 cm (0.63") (L x W x H), making it highly portable. It features two integrated USB cables, one extending about 10 cm (3.94") and the other approximately 15 cm (5.91"), offering flexible connection options. 4. Effortless User Interface: Designed for convenience, this USB timer features a plug-and-play design that is incredibly simple to operate. Adjusting the timer is intuitive: a quick press of the rotary knob switches between hour and minute setting modes, and rotating the knob precisely modifies the desired time value. To power off, simply long-press the knob for three seconds. 5. Versatile & Portable Utility: With its remarkably small and lightweight footprint, this USB timer is exceptionally easy to carry and integrate into any setup. It serves as an ideal solution for managing device charging, conserving power, and preventing potential overloads, whether you're at home, in the office, or on the go. Package list 1 x USB Countdown Power-off Switch