Features: Mini Wireless Transmission System: a low latency and high-quality MIDI system specifically designed for teaching, performance, and practice. Point-to-point MIDI Connection: replaces your MIDI cable, providing a wireless and unrestricted experience. Specific Protocol: advanced technology optimized for live use and performance, offering ultra-low latency, secure and stable connection, and extended wireless range. Ultra-low Latency: the MIDI system implements wireless MIDI protocol directly in the firmware, reducing latency to as low as 3 milliseconds with an optimized connection algorithm. Safe and Stable: the system establishes a highly reliable and stable connection. Rechargeable: MIDI B can be powered via adapter connected to power supply or PC; MIDI A features a built-in rechargeable lithium battery. Better Shape Compatibility: unique curved cable design allows use even with uncommon vertical interfaces. Upgradable: system can be updated using compatible software via data cable. Specifications: Material: ABS Operating Band: 2.4GHz Latency: 3ms