SONY Wireless Headphones MDR-IF245RK

<Features> 
■ Infrared Transmission 
You can easily enjoy clear sound without being bothered by the headphone cord, just by connecting the wireless headphone transmitter to the headphone jack, or to a television or audio device with an audio output jack. 
■ It is 
equipped with 40mm diameter driver unit , 40mm diameter driver unit. Reproduce the sound full of sense of presence. 
■ Easy charge 
・ We can easily charge just to put headphones in transmitter. 
■ Free adjustment mechanism 
・ We adopt free adjustment mechanism that adjustment of headband length is unnecessary. You can enjoy long-term listening with a comfortable fit. 
■ 
We can use for approximately 28 hours ・ It is available for approximately 28 hours by full charge if we use attached rechargeable battery. In addition, optional AAA batteries can be used for about 50 hours (※). 
(※) When using Sony alkaline battery LR03. Depending on the ambient temperature and conditions of use, the duration may differ from the above. 
Muting function 
· When the infrared rays are out of reach or the infrared rays are blocked, the muting function works automatically and the sound from the headphones I can not hear you. If the transmitter is approached or infrared rays can not be blocked, the muting status will be released automatically. 

<Specification> 
Headphones part 
■ Model: Open air dynamic type 
■ Driver unit: 40mm 
■ Magnet: Neodymium
■ Regeneration frequency band: 10 to 24,000 Hz 
■ Power supply: Rechargeable Ni-MH battery x1, AAA manganese battery x2 
■ Charging time: About 7 hours 
■ Battery duration time: About 28 hours 
■ Weight: 200 g (when battery is stored) 

Processor / Transmitter 
■ reach distance: up to 8m 
■ Processor transmission band: 10 ~ 20,000Hz 
Power supply: AC adapter included