seenda Bluetooth Wireless Keyboard for Windows/Mac, Rechargeable Slim Multi Device (2.4G USB+Dual BT4.0) Computer… Price: $1.86 (as of 31/03/2023 07:49 PST- Details) & FREE Shipping.

[3 in 1 Multi Device Keyboard]: Dual Bluetooth 4.0+2.4G wireless USB mode, easily pair and connect with up to 3 devices at a time.Support multi-OS, compatible with Mac OS, iPad, Macbook, iOS, Smartphone, Windows, and Android systems.
[Ultra Thin & Compact]: Only 380g(0.8lb),15mm slim bluetooth keyboard with a numeric keypad, lighter and more portable than a traditional standard keyboard. Perfect for a small & busy desk in office & home work, even business travel, no take up more space.
[Rechargeable Keyboard]: Built-in 280mAh lithium battery, It can be recharged easily with the micro USB charging cable included. No need for batteries any longer. Fast fully charged within 2 hours, can last 3-4 weeks for work.30 mins of inactivity auto-sleep and power switch design also keep a low consumption and long battery life.