The HiBy W4 is a portable Bluetooth receiver and USB DAC/amp in one small device. It switches between wireless and wired modes, drives headphones with its built-in amplification, and adds a 2-inch color touchscreen for playback, pairing and filter settings. An UnCharge lever lets it run on its internal battery over USB, cutting noise from external power. It suits people who want one travel-friendly box for phone and laptop listening, and it stands out from screenless dongles and receivers by putting controls and album art on the device itself.
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Owners rate the W4 well overall, with 4.4 out of 5 from 28 ratings. They value having Bluetooth and USB in one device and the touchscreen controls. Some note the screen and battery make it bulkier than a simple dongle.
The HiBy W4 is a portable Hi-Fi headphone amplifier that works as a Bluetooth receiver or as a USB DAC. It has a 2-inch color touchscreen for playback, pairing, filters and system settings. In Bluetooth mode, it can show album art.
It uses a Qualcomm QCC5181 Bluetooth chip with Bluetooth 5.4 and supports Snapdragon Sound. Two Cirrus Logic CS43198 DAC chips decode the left and right channels independently. Two independent femtosecond-grade oscillators (45.1584MHz and 49.152MHz) handle the 44.1x and 48x sampling families.
An UnCharge lever lets the W4 run on its internal battery while connected over USB, which reduces noise from external power and lowers the draw on a phone or computer. It has a detachable metal clip for wearing on clothing or bags. The clip can be removed to use the W4 as a flat dongle with MagSafe-compatible accessories. NFC one-touch pairing and a car audio mode are included. In car audio mode, the W4 powers on and off with the vehicle and reconnects automatically.
