1. Specification Parameters 1. Product Name: seenDa 4 - port USB Hub 2. USB Version: 2.0 3. Cable Length: 0.45 meters 4. Supported Systems: Mac, Vista, Windows 5. Supported Devices: Mobile phones, tablets, USB drives, OTG, personal computers, laptops 6. Dimensions: 76 * 24 * 24 mm 7. Material: ABS 8. Shell Manufacturing Process: Polished alloy, anti - slip and anti - fingerprint 2. Product Features 1. It adopts a USB 2.0 bonded chip, which is a high - speed chip. 2. It has a (high - speed) USB 2.0 interface, with a theoretical maximum speed of up to 480Mbps, and is backward compatible with USB 1.1/1.0 standard specifications. 3. It is equipped with four sets of USB jacks with hot - swappable function. 4. It has a current protection function, and supports overvoltage and instantaneous current protection functions, which can ensure safe and convenient use. 5. It has a stable working output. 6. Working Humidity: 10% - 90% 7. Working Voltage: 5V 8. Working Current: 500mA 9. Working Temperature: - 20°C - 75°C 10. Storage Temperature: - 40°C - 85°C 3. Package Contents 1. 1 4 - port USB Hub