Fosi Audio VOL20 Bluetooth Volume Control Knob, RGB Lighting USB Multimed Controller for PC/Gaming/Desktop Multi-Function Button
Gaming Controllers
“The VOL20 is a Bluetooth/USB-C volume knob with RGB lighting and an aluminum rotary potentiometer; it offers tactile, wired or wireless volume control plus media buttons and long battery life, but Bluetooth reliability, latency, and limited control with some USB‑DACs reduce its usefulness for shared/critical setups. For a gaming/desktop controller category: good feature set for desktop/audio hobbyists, mediocre if you need rock-solid Bluetooth or native analog attenuation.”
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Hefty aluminum knob gives precise, satisfying fine-volume adjustments.
bestclickbuy.comAll-Metal Construction
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RGB ring offers customizable ambient lighting without aggressive strobing.
hifireport.comRGB lighting ring is subtly ambient
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USB-C wired mode eliminates Bluetooth latency and gives immediate volume response.
community.fosiaudio.comPlugging it into USB-C resolves this and the device works
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Long battery life spec and user reports mean infrequent charging with RGB off.
hifireport.comUp to 500 hours of battery life with RGB disabled
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Physical media buttons enable pause/skip control remotely for many Bluetooth devices.
fosiaudio.compause song and skip / go back
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Unreliable Bluetooth: frequent disconnects and reconnects even close to PC.
fosiaudio.combluetooth connection is terrible
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Volume control depends on target device/software; some dongle DACs ignore knob volume.
community.fosiaudio.comother Dongle DACs... set the output volume of the phone to 100%
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Windows firmware issue can show persistent false low-battery notifications in system tray.
hifireport.compersistent false low-battery notification
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Bluetooth latency produces a perceptible delay between knob turn and on-screen volume.
hifireport.comBluetooth latency introduces a small but perceptible delay
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Pairs to only one Bluetooth device at a time; switching requires re-pairing.
hifireport.comconnects to only one Bluetooth device at a time
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Playback and track buttons are low-profile and hard to locate by touch when flat.
hifireport.comlow-profile and positioned at the base
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Works Great; Wobble is Annoying Knob works great, but the other comments about the "play" in the dial is very true.
eu.fosiaudio.comWorks Great; Wobble is Annoying Knob works great, but the other comments about the "play" in the dial is very true.
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E Explevi Works Great; Wobble is Annoying Knob works great, but the other comments about the "play" in the dial is very true.
eu.fosiaudio.comE Explevi Works Great; Wobble is Annoying Knob works great, but the other comments about the "play" in the dial is very true.
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E Explevi (Canada) Works Great; Wobble is Annoying Knob works great, but the other comments about the "play" in the dial is very true.
fosiaudio.comE Explevi (Canada) Works Great; Wobble is Annoying Knob works great, but the other comments about the "play" in the dial is very true.