- Frequency response (Hz)
- 10 ~ 22000
- Impedance (Ω)
- 2 x 40mm
- Net weight (kg)
SQM Rental House offers wireless headphones MDR-RF855RK from Sony. The device, which is equipped with two, 40-mm neodymium magnet acoustic transducers, reproduces sounds in the frequency range from 10 to 22,000 hertz. MDR-RF855RK are Circum Aural-type headphones with mold headband.
The great feature is a radio transmission system that is attached to the Sony MDR-RF855RK. The maximum range of the stereo radio signal is 100 meters, and the headphones are fully charged in about 7 hours - they're charged by matching their contacts with the transmitter's contacts. According to the manufacturer's specifications, Sony headphones are able to work about 18 hours on a full battery. The transmitter is powered by a 12-volt power supply, although it is worth mentioning that the headphones can work with AAA batteries.
The electrical resistance of the equipment is 36 ohms. The manufacturer did not provide information on the sensitivity of the headphones.