Wireless receiver: 1.Carrier frequency: 620.000~644.750 645.000~669.75745.250~765.000770.250~790.000 (If you didint choose the frequency we will send 745.25~765MHz for you.) 2.Number of channels:Dual channels 3.Modulation Mode:FM 4.Oscillation mode:PLL 5.Band width:30MHz 6.Maximum deviation:+/- 45KHz 7.S/N:>105dB 8.Frequency response:45Hz~18KHZ+/- 3dB 9.Supply:DC12V~16V 10W 10.Effective working distance:100 meter Bodypack Transmitter: 1.Carrier frequency: 620.000~644.750 645.000~669.75745.250~765.000770.250~790.000 2.Oscillation mode: PLL 3.Band width:<-65dBm 4.Harmonic radiation:+/-45 KHz 5.Maximum deviation:45Hz~18KHZ+/-.dB 6.Frequency response:120MHz 7.Capsule:Condenser 8.power output: 15mw 9.Battery: AA*2 10.Current consumption:<90mA 11.Continuous working time: 12 hours shipping list: 1.Two bodypack transmitter 2.Two headset and two lavalier 3.one receiver 4.audio cable 5.air box coner 6.receiver antenna 7.certificate of warranty card 8.Instruction Return and warranty 1.Our items come with one-year warranty. 2.If you are not satisfied with our items.please contact us within 7 days upon receipt of the delivery.They must be returned with the original package for the return or the exchange. 3.Please contact us first before opening any dispute or leaving any neutral or negative feedback. 4.If the item is defective,please check twice to confirm the item still not work and contact our customer service.let us know the detailed problem or send us some pictures for confirmation.Then get a solution or address for return. Feedback Your satisfaction is our greatest motivation! 1.If you are satisfied with the items and our service,please take a minute to leave us a positive feedback with 5 stars. 2.if you have any problem with the item.please don’t hesitate to contact us to get a better solution before you leave a neutral or negative feedback.we will provide you the best service. Shippment Please note: 1.Impost duties,taxes and charge are not included in the item price or shipping cost.These charges are the buyer’s responsibility.We suggest that you leave a message to let us know of declared value when you place the order. 2.The battery didn’t include in the shipping,please buy in the local market.we hope the understanding.Thank you! About us The largest microphone manufacturing base of China.is an enterprise that specialized in electronic product for designing,R&D,producing and selling.Our major product is the high quality wireless microphone.We adhere to the fundamental quality.innovation as the power focus on every detail.Be sure each product is fine for the idea.We have the business relationship in Southeast,Asia.South America and other places and so on.Our purpose is to provide the profession,meticulous services and the better quality products to customers.