Wireless over-ear headphones DEFENDER EEMOTION B640 BEIGE — binaural, closed acoustic, USB-C, AUX, 20–20000 Hz, 105 dB

DEFENDER EEMOTION B640 BEIGE are wireless over-ear (circumaural) binaural headphones with a closed acoustic design. They support wireless connectivity, USB‑C charging and an AUX input. The headphones cover a frequency range of 20–20000 Hz and have a sensitivity of 105 dB. The model is intended for universal use including music listening, calls and media playback. The product contains batteries that must be disposed of correctly.

Advantages

Closed acoustic construction and circumaural ear cups provide passive noise isolation and focused sound. Wireless connectivity with AUX backup and USB‑C charging ensures flexible connection options. Sensitivity of 105 dB and a 20–20000 Hz frequency response deliver clear reproduction across common audio ranges. Head‑band wearing style offers a stable, familiar fit for extended use.

Suitable for

• Listening to music at home or on the go
• Hands‑free phone and online calls
• Watching videos and streaming media
• Use with devices that support AUX or USB‑C charging

Key specifications

• Type: Wireless over‑ear (circumaural) binaural headphones
• Acoustic system: Closed
• Frequency response: 20–20000 Hz
• Sensitivity: 105 dB
• Wearing style: Head‑band
• Connectivity: Wireless with AUX input
• Charging/input port: USB‑C

How to use

Charge the headphones using a USB‑C cable before first use. Pair with a Bluetooth‑enabled device following the manufacturer’s pairing procedure; if a wired connection is preferred or battery is low, connect via the AUX input. Place the headband over the head so the circumaural ear cups fully cover the ears for best sound isolation and fit. Adjust device volume and call settings from the connected source.

Usage recommendations

Dispose of batteries according to local regulations. For optimal audio performance, keep firmware updated if applicable and avoid exposing the headphones to moisture or extreme temperatures.