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 with a wireless, unrestricted experience. Specific Protocol: advanced technology optimized for live use and performance, offering ultra-low latency, stable connection, and extended wireless coverage. Ultra-low Latency: the system implements wireless MIDI protocol directly in firmware, reducing latency to as low as 3 milliseconds with an optimized connection algorithm. Safe and Stable: establishes a reliable and stable MIDI connection. Rechargeable: MIDI B can be powered via adapter or connected to a PC; MIDI A features a built-in rechargeable lithium battery. Better Shape Compatibility: unique curved cable design allows use with rare vertical interfaces. Upgradable: system can be updated using included software and data cable. Specifications: Material: ABS Color: Black Operating Band: 2.4GHz Latency: Less than 3ms Range: Up to 10m transmission distance Power Requirement: MIDI A has a built-in lithium battery charged via USB cable Battery Life: Up to 48 hours Charging Device: USB charging cable Battery Capacity: 240mAh Package Contents: 1 x MIDI-A Adapter 1 x MIDI-B Adapter 1 x Type-C Cable 1 x Manual (English) Only the above package content is included; other items are not part of the package. Note: Lighting and display differences may cause slight variations between the product color in images and the actual item. Measurement error allowed is +/- 1-3cm.