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10+ New switches added in June! Click here to see our new arrivals
10+ New switches added in June! Click here to see our new arrivals

BT75 – 75% Bluetooth Wireless Hotswap PCB

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Original price $90.00 CAD
Original price $90.00 CAD - Original price $90.00 CAD
Original price $90.00 CAD
Current price $0.00 CAD
$0.00 CAD - $0.00 CAD
Current price $0.00 CAD

The future is here - custom wireless PCBs!

Polarity Works's BT series brings wireless connectivity and a full featured board for an amazing price. Available standalone or in a kit with the PLA75Includes a super thin 1200 mAh battery - only shipping within Canada due to regulations about shipping Li-Ion batteries.


75% hotswap pcb

Per-key white LED (hotswap)

RGB Underglow

USB-C connector for wired usage and battery charging

Bluetooth 5 wireless or USB-C wired connectivity

Rotary Encoder support

1200 mAh battery (BLE technology allows for more than a month of usage between charging)



KBD75 v1-v3.1




Any 75% case with a connector in the same position should work – ask us if you aren’t sure

More Details from Polarity Works

Introducing the Polarity Works Common Keyboard Platform (CKP). While developing this we had one goal in mind, design the best series of wireless PCBs on the market. Starting from scratch we listened to feedback from the users of the BT60 V1, added extra features, more layouts, more sizes as well as the thinnest battery ever seen in a keyboard for near 100% case compatibility.

Case compatibility to be rather challenging, especially on some 65s and 75s without a battery well, so we hunted the world for a battery slim enough to fit into almost all cases and came up empty. But we decided to create it! The Filament Power 1200 battery has a 1200mAh capacity and comes in at the THINNEST lipo battery ever put in a keyboard at just under 1.4mm thick.  it won’t decrease your battery life, with all lighting off expect the several months you’ve come to expect from our boards.

Check out our all new ZMK firmware GUI on our website or the Polarity Works website

The zmk-config repos for these boards are available here:

I'm not in Canada, can I get these in my country?

Yes. Check out Polarity Work's Vendor list for the other vendors.

(Unfortunately my carriers don't allow the shipping of Li-ion batteries internationally, so I cannot send these outside of Canada)