Button cell power,Size:CR2032 should prepare 2 pcs batteries extra.
SPLIT DESIGN: Ergonomic split keyboard layout with 46 keys total, featuring 23 keys per side for improved typing comfort and posture
WIRELESS CONNECTIVITY: 2.4G wireless capability with included USB receiver,not same with bluetooth receiver is neccessory
HOT-SWAPPABLE: Compatible with Kailh Choc V1 and V2 low-profile switches, allowing easy switch replacement without soldering
PROGRAMMABLE FEATURES: Supports Vial key mapping software for custom layout configuration and personalized key assignments