Features: USB 5V adjustable timer power-off switching control cable, countdown timer from 5 minutes to 24 hours and 55 minutes, timer power-off switching wire. Equipped with a digital display screen, allowing real-time viewing of time progress for intuitive operation. Supports 5V2A, plug and play, with a total cable length of 140cm; does not support data transmission. Compact design, easy to carry and use. Suitable for USB fans, blowers, USB water pumps, USB lights, fish tanks, and other USB-powered devices. Specifications: Material: Plastic Color: Black Middle Part Size: approx. 7 x 2.7 x 1.6cm / 2.76 x 1.06 x 0.63in Double Side Cable Length: approx. 70cm / 27.56in Interfaces: USB Male to USB Female Voltage: 5V Hour Threshold: 1hr Minute Threshold: 5mins Note: Please allow 1-2cm errors due to manual measurement. Slight color variations may occur due to different display resolutions. Package includes: 1 Piece USB Countdown Switching Control Cable