That is the listing of YARMEE Wireless Tour Guide Microphone System Charging Case is Optional : USD150 for 2 transmitters and 30 receivers Case / USD200 for 4 transmitters and 60 receivers Case YARMEE YT100 portable wireless tour guide system is designed especially for guides and groups.This can be a lightweight, multi-channel system that helps tour participants listen instantly to the tour guide clearly. Working distance up to 60 meters. Applications : Tour guideWhen a guide leads tourists, It’s natural to have situation crowded and noisy among tourists.When this situation happens, it isn’t comfortable for tourists to use the heavy and complicated guide devices. Additionally, YARMEE YT100 will also be made for tourists to be aware of the tour and for a guide to make a tour successfully. Simultaneous interpretationHave you ever experienced to use simultaneous interpretation devices which are difficult and complicated? YARMEE YT100 is direct and convenient product adapted in the international interpretation. It’s used in international conference, church, religious charities and so forth. Reception of the inspectionIn case of visiting tour like factories, docks and manufacturing companies, there are numerous inner noisiness. Due to this fact, It’s hard for a guide to lead the group there. If a guide uses YARMEE YT100 in this situation, he doesn’t have to divide the group and may give exact guidance even the big group. Also, YARMEEYT100 makes the image of a company to be enhanced and provides impressing tour with the usage of specific guide devices.Product features:Portable and wirelessPLL synthesized design, with high frequency stabilityDigital mute-locked technology, no any interferenceUnique anti-interference circuit, steer clear of the interference from other frequencies automatically99 IDs allows 99 groups to operate concurrently on the same placeOne transmitter can carry any choice of receiversBuilt-in rechargeable Lithium Batteryuse, 18 hours at leastLCD display, easy to operate, Adjustable volumeOver 60m communicating distancesThe specific sound-devices like MP3, Smartphone, and PC connected through a external terminal. Specification:YT100T Transmitter for Guide Technology VHF frequency band wireless Frequency 195MHz-230MHz / 72MHz-76MHz Sampling rate DC3.7V Frequency response 50-18KHz Channel 99 ch Latency <0.5ms Transmit distance 60m Working hours 13 hours LED display Power , signal and channel Accessory microphone & lanyard YT100R Receiver for Tourist Technology VHF frequency band wireless Frequency 195MHz-230MHz / 72MHz-76MHz Sampling rate DC3.7V Frequency response 50-18KHz Channel 99 ch Latency <0.5ms Transmit distance 60m Working hours 20 hours LED display Power , signal and channel Accessory earphone & lanyard Charging Case Packing included : Transmitter ReceiverClip-on microphoneEarphoneLanyardCharging case(Optional) : for 2 transmitter and 30 receiver / for 4 transmitter and 60 receiver PAYMENT PayPal is the basic way of payment we accept. If you like to send it to our bank account, please contact us. SHIPPING & HANDLING DETAILS Item will be shipped by Expedited Shipping Service within two business days after payment cleared. Estimated delivery time is three to five business days but may well be taken more days to a couple countries basically as a result of Custom's delay. Principally we ship to the shipping address on Ebay. When you have any issues about delivery time and tracking problem, please tell us before your case opening. RETURN POLICY If you don't seem to be satisfied with, you'll send it back to us for Refund or Exchange. Please contact us to solve any problem with the item before your case opening. We will be able to do our right for you. Returns should be in its original condition and package when the item is returned. Return shipping is the responsibility of the buyer unless return is the results of our mistake. CUSTOMS Import duties, Taxes and VAT don't seem to be included in the item price or shipping cost but are buyer's responsibility. When you have any question and request for it, just tell us. WARRANTY The product has 1-year warranty upon the purchase. Our warranty does not extend to the products that are physically damaged or that don't seem to be under normal operating conditions on account of misuse or incorrect installation.