Fangrui Product Details Features: Mini Wireless Mission 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: Curved Cable Design, Even The Rare Vertical Interface Can Also Be Used. Upgradabl