The new Micro84 2019 version:-
The Micro84 is an 84 key keyboard with a layout similar to a laptop, it can connect via USB and Bluetooth (3 different BT devices) and switch with a key press.
The Micro84 uses 35g Electro Capacitive switching similar to Topre switching but with the addition of being compatible with Cherry MX keycaps. Also included are 40+ additional 10g/20g springs that can be added under a keycap to increase the switch weight.
The keycaps are white and grey PBT with dark grey legends, the 2 function keys work the same on most of the keys but can be programmed to perform different actions as the layout is programmable, and on the left side of the keyboard is an on/off button (hold for 3 seconds.)
The RGB backlighting has several different modes/effects and can also be programmed.
Included is a detachable USB C to standard USB A white braided cable, this plugs in under the keyboard, a wire keypuller, 4 Mac keys for Mac mode, some replacement stabilizers (Filco style), a replacement on/off button and a dedicated USB transceiver.
The dedicated USB transceiver should work with this keyboard on any device that supports the USB-HID keyboard protocol (standard USB keyboard protocol), Bluetooth support is not needed, WinXP, Win7, Win8, Win10, Linux, Mac, Ios, Android and other operating systems including BIOS operations. It will only work with your Niz keyboard.
Bluetooth compatibility, I had problems connecting to a CSR V4.0 Bluetooth adaptor but the keyboard connected fine to my Galaxy Tab A with V4.2 Bluetooth.