Rapoo 1620 Silent Multi-mode (Bluetooth 3.40, 4.0 and Wireless 2.4G) Wireless Mouse.

• Silent switches reduce click noise.
• Switch between Bluetooth 3.0, 4.0 and 2.4G: The smart switch between Bluetooth 3.0, 4.0 and 2.4Gensures stable wireless transmission. You can still use your mouse regardless of USB port shortage or the loss of receiver.
• Intelligently switch among multiple devices: 1620 intelligently connects to the working device. It simultaneously connects to up to 3 devices and switches among them with ease. It simplifies complicated cross-platform use and meets multi-tasking requirements.
• Up to 9 months battery life: With Rapoo's energy saving technology and power switch, you can use your mouse without power interruption for up to 9 months.
• Manufacturer Warranty: 24 months