Features: Mini Wireless Transmission System: a low latency and MIDI system specifically designed for teaching, performance, and practice. Point-to-point MIDI Connection: provides a wireless and unrestricted experience instead of using a MIDI cable. Specific Protocol: advanced technology suitable for live and performance applications, offering ultra-low latency, stable connection, and long-distance wireless coverage. Ultra-low Latency: the MIDI system implements wireless MIDI protocol directly in the firmware, reducing latency to as low as 3 milliseconds with optimized connection algorithms. Safe and Stable: the system establishes a 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 with rare vertical interfaces. Upgradable: system can be upgraded using included software and data cable. Specifications: Material: ABS Color: Black Operating Band: 2.4GHz Latency: Less than 3ms Range: 10m transmission distance Power Requirement: MIDI A has built-in lithium battery, chargeable via USB cable Battery Life: Up to 48 hours Charging Device: USB charging cable Battery: 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: Light reflection and differences in display screens may cause slight color variations between the image and the actual item. Measurement error allowed is +/- 1-3cm.