Features: Mini Wireless Transmission System: a low latency and MIDI system that it is specifically designed for teaching, performance, and practice. Point-to-point MIDI Connection: instead of your MIDI cable, it gives you a sense of wireless and unconstrained free experience. Specific Protocol: new technology more suitable for live and performance, with ultra-low latency connection, safe and stable connection and long-distance wireless coverage. Ultra-low Latency: MIDI system directly implements the wireless MIDI protocol in the firmware, so the latency time is reduced, as low as 3 milliseconds, optimized connection algorithm intelligently. Safe and Stable: MIDI system is used to establish a very stable connection. Rechargeable: MIDI B can be directly connected to the power supply or PC through the adapter to obtain the required power, MIDI A is equipped with a built-in rechargeable lithium battery. Better Shape Compatibility: unique curved cable design, even the rare vertical interface can also be used. Upgradable: use the supporting software to upgrade the system through the data cable. Specifications: Material: ABS Colour: Black Operating Band: 2.4GHz Latency: Less than 3ms Range: 10m transmission distance Power Requirement: MIDI A built-in lithium battery can be by 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, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.