The overall functionality has been confirmed. This is a small, split, ortholinear double trackball keyboard. With the current firmware settings, the right trackball controls cursor movement, and the left trackball controls scrolling. Specifications: ・Wireless ・ZMK Firmware ・40 keys ・Simple gasket mount (PORON foam) ・Choc V2 switch compatible ・18mm trackball ・17mm pitch ・Screwless design ・Bearing trackball case ・PAW3220 sensor x2 The switches used are Kailh DeepSea Silent mini linear. The case and keycaps are made of Bambu Lab PLA Matte. The lithium-ion battery is 300mAh. (Please handle with care.) Firmware: https://github.com/MeowCatpawkittie/zmk-config-Pyuron/tree/paw3220