This set consists of a WM-1D Wireless MIDI USB dongle and a WM-1 Wireless MIDI adapter. Roland enables wireless MIDI signal transmission with extremely low latency of just 3 ms and a range of 10 m with these devices. These wireless MIDI adapters replace traditional MIDI cables and allow communication between MIDI-capable devices such as keyboards, drum machines, etc., with macOS/iOS Bluetooth devices or other Roland Wireless MIDI devices (e.g., additional WM-1 or WM-1D). The WM-1D and WM-1 can each be directly connected to Mac and iOS devices. Due to the very low latencies, the response behavior is identical to that of a MIDI cable. The USB dongle also works with Windows devices. In addition to transmitting MIDI notes, tempo sync data, effects, LFOs, loops, and more can also be sent via MIDI. The standard mode of the WM-1D is suitable for most playing situations. However, particularly time-critical applications may require a bit more speed. In fast mode, the latency is reduced to 3 milliseconds. This is lower than the internal processing speed of many hardware devices and allows for particularly fast transmission between WM units. Details: Set includes WM-1D USB dongle and WM-1 adapter, wireless MIDI transmission with iOS devices, laptops, and tablets, transmission range: 2.4 GHz, sends up to 10 m, the devices are compatible with each other and can be connected to other Roland Wireless MIDI devices, standard mode and fast mode for extremely low latency of 3 ms, very low latency. Package includes: 1x WM-1D MIDI USB dongle, 1x WM-1 MIDI adapter.