The nice!nano v2 is an alternative Pro-micro-based controller that allows for wireless connection via Bluetooth, without draining too much power from your battery! Its low-profile design means that even with a battery your keyboard will still look sleek and professional. FeaturesBLE Bluetooth connection (Ultra-low power usage)Mid-mount USB Type-CTotal of 21 I/O Pins (3 more than the Pro Micro)1.6mm thick PCB for a slimmer profile What's includedNice!nano v2 Controller 2x 12-pin headers 1x 3-pin header CompatibilityCompatible with Pro Micro-based PCBs Socket typeMid-mount USB Type C Size Length - 34.1mmWidth - 18.3mmHeight - 3.3mm MCU Specifications (Nordic nRF52840) Voltage - 5VClock speed - 64 MHzDigital I/O pins - 25RAM - 256 KBProgram memory - 1MBBootloader - Adafruit Firmware supportZMKBlueMicro Useful linksZMK Addons Controller SocketsSocket Pins Soldering requiredThe nice!nano will NOT work with the Gherkin or Helix unless you leave the RAW pin disconnected from the board. For split builds, you will need to purchase 2 nice!nanos. Due to limitations/restrictions, the nice!nano doesn’t play nice with other micro-controllers. Requires a 3.7v lithium rechargeable battery. We recommend this Battery as it fits under the header pins.DO NOT use the nice!nano with TRRS cables, this can result in breaking the controller(s).