Defender FreeMotion B571 LED (63571) is a wireless stereo headset with a built-in microphone for listening and calls. It connects via Bluetooth V5.4 + EDR and has Type-C and 3.5 mm jack connectors for wired use.
Its 40 mm membranes reproduce audio across 20–20000 Hz, while the microphone response is 20–16000 Hz. LED lighting, an adjustable headband with a metal base and a foldable design shape the headset and make it easier to store.
The MicroSD card slot and included audio cable provide additional ways to listen. The headset can connect to two devices simultaneously. Its stated operating range is 0–10 m, and continuous talk or listening time is up to 50 hours.