Precise 24-hour time setting: The integrated digital USB timer supports countdown adjustment of up to 24 hours for USB-powered devices. Set the shut-off time for fans, lights, chargers, or small appliances to automate power control and avoid overcharging. Materials and durable construction: This pack of 2 USB countdown timer switch cables is made of copper conductors and durable outer sheathing. Energy-efficient and safe operation: Devices are automatically switched off after the preset time, reducing idle power consumption. Easy to use: Simply plug the timer cable into a standard USB port, connect your device, and set the desired countdown on the digital display. No programming or additional software required. Suitable for home, office, dorm rooms, or travel with 5V USB-powered devices. Compact and portable: Each USB timer cable measures approximately 20 cm. Color: Black Material: Plastic Package Contents: 2 × USB Countdown Timer Switch Cables Note: Color appearance may vary slightly due to screen settings and lighting. Measurement tolerance: ±1–3 cm.