Sony MDR-RF811RK

. The Sony MDR-RF811RK is an over-the-head wireless headphone designed primarily for music listening. It features a black color scheme and offers a comfortable fit due to its head-band wearing style.

The headphones are equipped with a closed acoustic system which helps in isolating external noise while providing clear sound reproduction within the frequency range of 20 Hz to 20 kHz. They utilize neodymium magnets for enhanced performance and have driver units measuring 4 cm in diameter. Volume control can be adjusted using both rotary buttons and a built-in microphone, although no specific information about the microphone type was provided.

The battery technology used is nickel-metal hydride (NiMH), capable of delivering up to 13 hours of continuous audio playback time on a single charge. This device supports charging via an AC source and includes a rechargeable battery that takes approximately 16 hours to fully charge. Additionally, it comes with a compact wireless receiver compatible with standard 3.5mm jacks.

Essential specs

• Model: Sony MDR-RF811RK
• Product type: Headphones
• Colour: Black
• Weight: 270 g
• Controls: Buttons, Rotary
• Battery life: 780 min
• sku: MDRRF811RK
• Wearing style: Head-band