The Tecno Buds 4 follow a true wireless, in-ear design with no cables, neckband, or wingtips, keeping the form factor compact and unobtrusive. Each earbud weighs just 7.4 grams and carries an IPX4 rating, making them sweat resistant and suitable for use during physical activity. They feature stereo speakers but do not include RGB lighting, a UV light, or any display. Wingtips are not bundled in the package.
The Tecno Buds 4 use a 10 mm driver unit and cover a frequency range of 20 Hz to 20,000 Hz. They rely on passive noise reduction to limit ambient sound rather than active noise cancellation, which is not supported. The earbuds do not include a neodymium magnet, and there is no support for spatial audio, Dolby Atmos, or Dirac Virtuo processing.
The Tecno Buds 4 are equipped with a rechargeable 37 mAh battery per earbud, delivering up to 5 hours of playback on a single charge, while the 500 mAh charging case adds a further 23 hours of total battery life. A full charge takes approximately 1 hour, and neither wireless charging nor solar charging is supported. The earbuds include a battery level indicator so the remaining charge can be monitored at a glance.
The Tecno Buds 4 connect wirelessly via Bluetooth 5.4 with a maximum range of 10 meters, and the charging case uses USB Type-C for wired charging. Fast pairing, NFC pairing, and Auracast are not supported, and the earbuds do not include AAC, LDAC, LDHC, or any variant of aptX, including aptX HD, aptX Adaptive, aptX Low Latency, aptX Lossless, and aptX Voice. Bluetooth LE Audio is likewise absent, meaning the connection relies on the standard Bluetooth 5.4 protocol without any advanced codec or audio-sharing extensions.
The Tecno Buds 4 support fast charging and can function as a headset for calls, with controls handled through a panel placed directly on the earbuds rather than an in-line remote. A mute function and voice prompts are included, and a travel bag comes in the box. The earbuds do not offer ambient sound mode, in-ear detection for auto-pausing, a find-device feature, notification readout, a built-in translator, a body temperature sensor, or a camera remote shutter function.
The Tecno Buds 4 feature a 4-microphone setup with noise-canceling microphone technology, aimed at reducing background noise during calls and voice input.