UGREEN USB-C Audio + 60 W Charging Adapter (25837)

Overview

The UGREEN CM721 (25837) lets you use wired headphones on a USB-C phone or tablet and charge it at the same time. It plugs into the USB-C port and gives you a 3.5 mm headphone socket with a built-in digital-to-analogue converter (DAC), plus a USB-C charging input that passes up to 60 W through to the device. It suits long listening or video sessions where the battery would otherwise run down.

Is it right for you?

• Suits USB-C phones, tablets and laptops that support digital USB audio and accept charging through an audio adapter.
• Also works with powered speakers and car or home AUX inputs through a 3.5 mm cable.
• Lightning iPhones are not direct targets; USB-C iPhone 15 and 16 generation and later USB-C Apple devices are, when they support digital USB audio.
• If you need USB data, video or a hub, this is not it: the female USB-C port is for charging only.
• Apple headphone line control is not supported.

Key features

• Built-in DAC up to 32-bit, 384 kHz PCM, with a signal-to-noise ratio above 110 dBFS under its test conditions.
• Charging pass-through up to 60 W when the charger, cable, adapter and device share a supported profile.
• Charging controller lists USB Power Delivery (PD) 3.0 and 2.0, PPS, QC 4.0 and 3.0, AFC and SCP; the final rate is negotiated by the whole path.
• Listening and charging at the same time on a compatible device.
• Compatible CTIA headset microphone, calls and inline controls can work when the headset and host support them.
• Nylon-braided lead, aluminium-alloy housing and a magnetic coupling for storage, tested to 20,000 bends.

What else you need

• A USB-C device that supports digital USB audio.
• Headphones, earphones or a 3.5 mm cable to a powered speaker or AUX input.
• For charging, a separate USB-C PD charger and cable of no more than 60 W, and a device that accepts charging through an audio adapter.

Before you buy

• Confirm the host port is USB-C and supports digital USB audio, and that the device can charge through an audio adapter at no more than 60 W.
• The female USB-C port is for charging only: no USB data, storage, keyboards, Ethernet, hubs, docks, displays, DisplayPort Alt Mode, HDMI, Thunderbolt or USB4 video.
• Not a charger or battery itself; it needs an external USB-C power source.
• Does not connect to Lightning-only devices and does not guarantee Apple headset inline-button control.
• Does not power passive speakers.
• Inline controls, sample rate and charging power vary by host, app and accessory; test before relying on them.
• Some charger and device combinations can produce hum while charging. Disconnect charging if noise is severe or heat appears.
• The magnetic coupling is for storage. It is not MagSafe, Qi, a breakaway or a data connector; keep it away from magnetic-stripe cards.
• Start at low volume. The Hi-Res label is not a safe-volume guarantee.
• Stop using it if a connector or jacket is bent, cracked, loose or unusually hot. Keep connectors dry and free of debris.
• A USB-C wall charger, charging cable, headphones and 3.5 mm AUX cable are not identified as included.