Attributes

Brand	-
Category	Electronic Components / Maker DIY / Development Boards & Control Boards
Origin	-
Microcontroller	Nordic NRF52840
Flash Memory	1 MB
SRAM	256 KB
Wireless Protocol	Bluetooth 5.0 / 2.4GHz
USB Interface	USB Type-C
Battery Charging	Built-in Li-Po Management
Logic Voltage	3.3V
Pin Layout	ProMicro Compatible
Dimensions	33 x 18 x 8 mm
Weight	3.5 grams

5 reviews

Anonymous

Mar 28, 2026

Rating: 3/5

Hard to flash first time

Took me a while to get the bootloader mode right. Works now though.

Anonymous

Mar 18, 2026

Rating: 4/5

Great board, minor pin confusion

Hardware is solid. Wish the pinout diagram was clearer in the box.

Anonymous

Feb 19, 2026

Rating: 5/5

Perfect for custom keyboards

Works flawlessly with ZMK. Bluetooth pairing is quick and stable.

Anonymous

Feb 12, 2026

Rating: 5/5

Stable connection

Using this for a mouse project. No lag detected. Charging works well.

Anonymous

Feb 09, 2026

Rating: 5/5

Excellent NRF52840 clone

Compatible with nice!nano firmware out of the box. Very happy with purchase.

5 FAQ

Q: Does it come with headers soldered?

A: No, headers are not included to keep the profile low.

Q: What is the maximum charging current?

A: The built-in charging management supports up to 100mA safely.

Q: Can I use this for a wireless mouse?

A: Yes, the NRF52840 is suitable for low-latency mouse projects.

Q: Is this compatible with QMK firmware?

A: Yes, it supports QMK and ZMK firmware.

Q: What type of battery connector is used?

A: It uses a standard JST PH 2.0mm connector.

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