How much does this cost to the nearest dollar?

Knox portable Headphone Amplifier mixer 4 Channels Metal Stereo Audio Amplifier, Balanced Headphone Output Audio Input, 4 Channels Amp Metal Stereo Audio Amplifier, Mini Headphone Splitter dac
Four Independent Channels Transmit and amplify sound to four headphone sets simultaneously. With 4 separate balanced volume controls, multiple people can listen to the same audio dac source at their own volume preference. Crisp and Clear Sound Turn up the volume on the headphone amplifier and enjoy the smooth and steady sound. This headset amp has 1/4 stereo input and output, with 1/8 - 1/4 adapters included for input and output. 12v Power adapter included. Versatile and Multi-Purpose The black headset splitter/amplifier /mixer is ideal for use in both the home

Price is $45.00

Price: $44.99