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Please keep the device horizontally;
Connect the device using the provided cable. The standard USB cable
length is 3m, but you can purchase a longer one if needed (we recommend
UGREEN brand). The maximum recommended length for a USB cable is
5m. If you need a longer cable, buy an extension cable with a signal amplifi-
er; otherwise, it may cause signal instability, resulting in equipment not
being recognized, noise, and other issues;
Ensure that the USB connection is stable. Avoid frequently plugging and
unplugging, as well as applying external force, as this may damage the USB
interface or cable;
When cascading multiple devices, be sure to connect DC power supply;
Do not cover the microphone hole shown in the image below. Doing so may
affect the quality of your audio.
CAUTION
Ensure that nothing is blocking the device on the table;
When cleaning the table, make sure not to wipe the device;
Unauthorized disassembly and strong impacts can cause damage to the
device;
The equipment should be kept away from high temperature environment,
heat source, strong magnetic field, strong electric field;
Consistent exposure to loud noises can cause hearing loss;
The A20 has a sound pickup range of up to 3 meters in a quiet, reverbera-
tion-free environment. For larger areas, increase the number of A20s for
daisy-chaining, or purchase a longer CAT6 cable;
After the A20 is daisy-chain with C30R, the A20 is powered by the network
cable, and there is no need to supply power through the adapter.
8 MEMS microphone array
