Product Name: Vissonic Multi Functional Interpretation Simultaneous Interpretation Translation System Color: Black Pointing Feature: Cardioid Communication: Wireless Composition: Lcd Display Video: Video Type: Simultaneous Interpretation System Trademark: VISSonIC Transport Package: Carton Origin: China HS Code: 85176239 Product Description FeatureCompliant to IEC 61603-7 and IEC 60914Compatible with any other IR simultaneous interpretation system compliant to IEC 61603-7Digital infrared processor with DQPSK digital modulation/demodulation technologyTransmitting in 2~8 MHz frequency band eliminates disturbance from high frequency lighting systemsChannel selection via up/down button, at most 4,8,16 or 32 channels availableLCD display with channel number, language name, battery and signal status indicationNumber of available channels is always the same as the number of channels in use by the system, eliminating the need to scroll through unused channelsAdjustable volumeUnique 270º super wide reception angle, ensuring perfect sound quality even when casually placedAudio signal automatically muted when signal is too low, ensuring that the user receives only high quality audio.Ergonomically compact and elegant designLightweight and handy receiver in conjunction with single earphone or headphone for easy and comfortable useCan be hung over the neck via a nice strap or fit into the shirt pocketFreedom of movement within the range of IR power radiatorNo limit to the receiver number within the IR power radiation rangeWorks without errors, even in bright sunlightBuilt-in high precision rechargeable circuitry to prolong battery lifeEnvironmentally-friendly lithium rechargeable battery packNo power consumption and auto-off when headphone is disconnected after 5 minutesControls and IndicatorsLCD displays channel number, language name, battery capacity, signal intensity and volume Power switchChannel selector buttonsVolume control buttonsInterconnectionsØ 3.5 mm stereo earphone jackCharging contactsTechnical SpecificationsSystem SpecificationsModulation...............DQPSK, according to IEC 61603-7 Modulation frequencyCarriers 0 to 5...............2 to 6 MHz, according to IEC 61603-7Frequency response...............20 Hz to 10 kHz (-3dB) at standard quality;20 Hz to 20 kHz (-3dB) at perfect qualityTHD at 1 KHz ...............<0.05%Isolation...............>80 dBDynamic range...............>80 dBWeighted SNR...............>80 dBAInput range...............-12 dBV ~ +12 dBV (adjustable)ElectricalIR irradiance level...............4 mW/m2 per carrierAngle of sensitivity...............270ºHeadphone output level at 2.4 V 450 mVrms (speech at maximum volume, 32 Ohm headphone)Headphone output freq. range...............20 Hz to 20 kHzHeadphone output impedance...............32 Ohm to 2 kOhmMax. SNR...............>80 dBASupply voltage...............3V to 4.2V,nominal 3.7 VHeadphone jack unplugged after 5 minutes...............0 mA Battery lifeRechargeable battery pack ...............24 hoursMechanicalDimensions (H x W x D) ...............159 x 49 x 23 mmWeight............... excluding battery 85 gincluding battery 128g (0.27 lb)Color...............black with silver