Compare of the 4 Wireless keyboards:

Please read the full documentation in the link below before you buy or use this keyboard!

Ship without battery because of the international shipping policy of Lithium battery from DHL. You need to buy the battery yourself! Battery type: BL-5B, normal price:6 US dollar.

Some modified work by Joe LiTrenta:

You can choose flattened shoulder keys when you want to attach the keyboard to a phone with magnet.
main Features: Processor: NRF52840 from Nordic Semiconductor
Firmware: Modified ZMK Firmware.
Swapable battery Design: Replace your battery in 10 seconds.
Battery type: Nokia BL-5B. You can buy it anywhere in the world.
Long battery life: The keyboard can work more than 3 months when normally used without recharging.
Mouse and scroll wheel 2 in 1: When enable Capslock, the trackpad works as scroll wheel.
Compatible with all platform: Android, Apple, Windows, Linux, Steamdeck or even Car(tested work OK on Lixiang L9 max) as long as your device has Bluetooth modul.
On board charging circuit: The USB-C port can not only be used for data transmitting but also can be used for charging battery
USB&BLE Output: Support both wired and wireless connect.
Shoulder keys: There are two shoulder keys on top side of the keyboard which can be used as mouse left and right keys.
Multidevice connect: The keyboard can be paired with up to 4 devices at the same and can be switched between them easily.

What you get

• The bb9983 BLE&USB keyboard assembled with a 3D printed case in a plastic box.
• A tiny blackberry metallic sticker.
  Note: Ship without battery, you need to buy the battery yourself!

Questions or need more info? Join my Discord Channel!

If you buy two or more wireless keyboard at my store, I will gift you a BL-5B battery charger for free!

For Japanese or Korean customers, you can place your shipping address/name in your own language in the additional instruction.