Main Features: Using two AA type rechargeable batteries or two disposable batteries. The receiver or the transmitter can be placed in the charging case to get the rechargeable batteries charged. PLL synthesized design, with high frequency stability Digital pilotone & noise cancel technology, interfering voice ellimination Three randomly selectable channels, completedly avoid the interference of the same frequency Audio input for external connecttion to audio inputs, such as CD, MP3 and so on share the music for everybody. Also digital tour guide recording can be played. Using ordinary or rechargeable battery AA and the batteries can last for more than twenty hours LED automatic display when battery of the transmitter or the receiver is low. Also the receiver has the receiving LED automatic displaying function In the same location, three different groups can used this system simultaneously Being able to be used in one-to-one and one to multiple system, the number of the receivers can be unlimitedly expanded according to the need Being able to be used in simultaneous interpretation, portable camera, wireless microphone system, wireless earphone and so on situations Main Specifications: Transmitter AGT310 Power Supply 2X1.5V AA Operating Frequency CH1 751.6MHZ CH2 752.2MHZ CH3 752.8MHZ RF Output Power 10mW Harmonic >50dB Battery Life About 30 hours (Battery capacity of 2400mAh ) Dimensions 60mmX91mmX23mm Weight 80gExcluding the batteries Receiver AGR310 Power Supply 2X1.5V AA Operating Frequency CH1 751.6MHZ CH2 752.2MHZ CH3 752.8MHZ Sensitivity 10dBu Available Distance >50m(In situation of non-interferance) Battery Life About 25 hours (Battery capacity of 2400mAh ) Dimensions 60mmX91mmX23mm Weight 80gExcluding the batteries Battery Charger AG310-C Charging Time of batteries fully charged About 8 hours/ (Battery capacity of 2400mAh ) Number of charging slots 24 Dimensions 59cm×38cm×16cm Main Applications Widely used in touring, visiting and studying activities of the touring and training groups Used in reception of visitants in product presentation, advanced exhibition of large companies Used in meeting and teaching of school and so on. Movable wireless simultaneous interpretation system Wireless microphone Wireless earphone Combination of the portable video camera and wireless microphone. Wireless monitor of the performance: especially used for the acting singer to monitor the accompaniment Interpretation without interference Exhibition Museum School Impregnable Interpretation Crowded Square Noisy Factory Outside Activities Suggested System: 20-Person Tour Guide System (One to multiple system) --Transmitter AGT310 1 -Headset Microphone HM01 1 -Receiver AGR310 20 -Earphone PH01 20 -Battery Charger AG310-C 1 Selectable Accessories: Suitcase SC01 Headset Microphone Earphone 1 PH01 Earphone 2 PH02 Waistband WB01