How much does this cost to the nearest dollar?

EXMAX EX-100 Wireless Tour Guide Monitoring Acoustic Audio Voice Transmission System Microphone Earphone For Church Translation Simultaneous Interpreting Teaching City Tour (1 Transmitter 2 Receivers)
The EXMAX wireless audio transmission system could transmit voice of who speak to the microphone of transmitter to the ones who wear earphone of receivers,transmission distance is about 20-30 meters frequency channels mean it has 40 select IDs allow at least 10 groups to work simultaneously.Widely used for field trip,tour exhibit guides,sermon interpretation,work-study,conferences,translation,audio visual laboratory,events for church,family,restaurants,hajj... Transmitter weighs 56g and receiver weighs and light for carry or carriage.High S/N ensure cleanest voice transmission.

Price is $90.00
Price: $89.99