The Anker Soundcore Liberty 4 Pro use an in-ear fit and operate as true wireless earbuds, meaning there are no cables or neckband involved. Each earbud weighs 11 g and delivers stereo sound without RGB lighting, wingtips, or UV light. The charging case features a built-in display for status monitoring. For durability during physical activity, the earbuds carry an IPX5 ingress protection rating, making them resistant to sweat.
The Anker Soundcore Liberty 4 Pro feature a 10.5 mm driver unit with a frequency range spanning 14 Hz to 40,000 Hz and an impedance of 21 Ohms. Both active noise cancellation and passive noise reduction are supported, giving listeners multiple ways to manage unwanted ambient sound. The earbuds also support spatial audio, though they do not include Dolby Atmos, Dirac Virtuo, or a neodymium magnet.
The Anker Soundcore Liberty 4 Pro offer 10 hours of battery life per charge, which drops to 7.5 hours when active noise cancellation is enabled. The included charging case extends total playback to 40 hours, and the earbuds support wireless charging alongside standard wired recharging via their rechargeable battery. A battery level indicator is built in to help track remaining charge, while solar power is not a feature of this model.
The Anker Soundcore Liberty 4 Pro connect wirelessly via Bluetooth 5.3 with a maximum range of 10 m, and support fast pairing for quick device setup. Supported audio codecs include LDAC and AAC, while aptX in all its variants (including aptX Adaptive, aptX HD, aptX Low Latency, aptX Lossless, and aptX Voice), LDHC, and Bluetooth LE Audio are not supported. Auracast and NFC pairing are also absent, but the charging case uses USB Type-C for wired charging.
The Anker Soundcore Liberty 4 Pro include a practical set of features for daily use, among them ambient sound mode, in/on-ear detection for automatic music pausing, a find device function, and fast charging support. They can connect to two devices simultaneously via multipoint pairing and double as a headset, with a mute function, voice prompts, and a control panel on the device itself. A built-in camera remote shutter adds a convenient extra, and a travel bag is included in the box. Notification reading, a built-in translator, an in-line control panel, and a body temperature sensor are not part of this model.
The Anker Soundcore Liberty 4 Pro are equipped with 6 microphones in total, and the microphone setup includes noise-canceling capability to help reduce unwanted background sound during calls and voice input.