User manual PYLE PLVWH1

[. . . ] WIRELESS INFRARED SURROUND HEADPHONE PLVWH1 Overview The PLVWH1 is a true wireless headphone system which uses latest high frequency modulation infrared technology. [. . . ] True surround sound, elegant design and rich finish of the system add into the beauty of your expesive automobile entertainment systems. The signal input level is automatically adjusted by the built-in Automatic Input Level control Circuit (ALC). Since this system uses infrared ray, if the headphones/receivers are placed too far from the transmitter, a hissing noise may increase. This is a characteristic of infrared systems and does not mean that the system is defective Do not use this system in the open air under direct sunlight as the infrared system will not work properly. 1 Precautions * Operate the transmitter on 12V 100mA. * Do not leave the system in a location near heat sources such as radiators or airducts, or in a place subject to direct sunlight, excessive dust, moisture, rain, mechanical vibrantion, or shock. * Do not use alcohol, benzine or thinner to clean the cabinet. Headphone 1. [. . . ] within 5 meters from the emitter of the transmitter. Specifications: * POWER REQUIREMENTS: 3VDC (1. 5V AA x 2) * TYPE: OPEN AIR DYNAMIC * DRIVE UNIT: 40 mm MYLAR CONE * IMPEDANCE: 32 OHM +-6. 4 OHM * FREQUENCY RESPONSE: 20 Hz ~ 23 KHz * S. P. L. : 98 dB / NOM. [. . . ]