Portable Business. Exquisite appearance, comfortable grip feeling. Stable Wireless. 2. 4g wireless transmission technology effective working distance up to 10M. Energy-efficient, durable life. Automatically sleep during leisure time, smarter and more energy-efficient. Ergonomic Design. It is not easy to cause fatigue when used for a long time. Colorful Life. Calm black, elegant white, sweet pink, etc. What you like is beautiful.