Amkette Optimus Bluetooth 4‑in‑1 Wireless Keyboard – New and Improved Optimus BT 4-in-1 Multi-Device Wireless Keyboard (Blue) is a versatile and modern wireless keyboard built for multitasking across multiple devices and platforms. It lets you connect up to 4 devices simultaneously — 3 via Bluetooth and 1 via a 2.4 GHz USB wireless dongle — and switch between them quickly with dedicated keys for improved productivity. Designed with silent membrane (“Retro Pop”) keys, it delivers a smooth, quiet typing experience that’s comfortable for long typing sessions. The keyboard also features OS-adaptive AI access keys that can launch tools like Microsoft Copilot on Windows, Siri on Apple devices, or Gemini on Android, as well as multimedia and shortcut keys for quick control of volume, screenshots, emojis, show desktop, and more. Its dual-OS layout ensures compatibility across Windows, macOS, Android, and iOS, making it ideal for users who work with phones, tablets, and laptops interchangeably. Powered by 2 AAA batteries with smart power-saving features (including on/off switch and sleep mode), the keyboard offers portable and long-lasting performance without frequent recharging. This model is a great choice for users seeking a compact, multi-device keyboard that supports seamless switching and enhanced productivity across devices.