How much does this cost to the nearest dollar?

UHF Wireless Guitar System, Rechargeable Digital Wireless Guitar Transmitter Receiver with 20 Channels and Over 6 Hours Long Battery Life for Electric Guitar Bass
Low Latency The wireless guitar system uses the latest UHF technology with ultra-high frequency, a delay of less than 2ms, no delay or signal loss, instant transmission of sound quality, stable audio signal, and a more satisfying stage performance. 100 ft transmission distance Our Wireless Guitar Transmitter Receiver uses UHF chips for uncompressed signal transmission, low noise and delay, with an effective range of about 100 feet. Plug-and-Play Simply turn it on and it will automatically pair with a short press, without any complex operations. It supports 20 devices working simultaneously and the wireless transmission and reception are one-to-one without interference.

Price is $
Price: $39.99