Penna ELRETRON Bluetooth Keyboard with Black Chrome Keycap(US Language, F 1.1V) (Olive Green, Cherry MX Blue)

["PENNA Typewriter style mechanical wireless bluetooth keyboard with 2 standard AA batteries(batteries not included)","Wide Compatiblity :Bluetooth(BLE 4.2) :Widely Compatible with Cellphone,Tablet or laptop with Android, Windows10, iOS and Mac OS system NOTE: For Desktop PC Laptop without bluetooth function, you need to use third-party bluetooth dongle adapter (not included) before use this bluetooth keyboard","Multi Device Pairing 5 Devices:Switch easily between devices","Genuine Cherry MX Mechanical Switch(Made in German).","Cradle Holder - Built-in cradle holds your smartphone / tablet at the ideal angle for viewing"]