Features: Mini Wireless Transmission System: a low latency and good quality 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. 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 Operating Band: 2.4GHz Latency: <3ms Range: ≤10m transmission distance Power Requirement: MIDI A built-in lithium battery can be charged by USB cable Battery Life: Up to 48 hours Charging Device: USB charging cable Battery: 240mAh MIDI-A OUT Single Body Size: 52 * 20 * 18mm / 2.05 * 0.79 * 0.71in MIDI-A IN Single Body Size: 30 * 20 * 18mm / 1.18 * 0.79 * 0.71in Midi-B Single Body Size: 48 * 20 * 10mm / 1.89 * 0.79 * 0.39in Item Weight: 43g / 1.52oz Package Weight: 69g / 2.46oz Package Size: 11.5 * 6.5 * 2.5cm / 4.53 * 2.56 * 0.98in Packing List: 1 * MIDI-A 1 * MIDI-B 1 * USB Cable 1 * Manual (English)