Feature: 1. Main Application: USB 5V temperature controller is mainly used for 5V USB electric heater. Total line length is about 104.3cm / 41.1in. 2. 3 Speed Adjustable Temperature: 5V temperature controller with 3 adjustable levels of high, medium and low. 3. Safe and Convenient to Use: USB plug and extension cable are designed to be simple, convenient and safe. 4. Good Workmanship: Exquisite workmanship, beautiful appearance design, providing you great using experience. 5. Light and Small: The lightweight and small size allow you to put it in your carrying bag, easy to carry and store. Specification: Item Type: USB Temperature Control Switch Material: ABS Power Supply: USB Interface: for Android Voltage: 5V Gear: 3 Gears, Low, Medium, High Total Line Length: Approx. 104.3cm / 41.1in Color: As Pictures Shown Weight: Approx. 26g / 0.9oz. Package List: 1 x USB Temperature Control Switch