Sound card - with 4 inputs and 4 outputs, USB, 4 × microphone XLR / 4 × line input, 2 × instrument input, 4 × line output, headphone output, Windows and Mac support, included in Cubase LE software package
Headphone Amplifier - bluetooth, impedance up to 600 ohms, signal to noise ratio 110dB, 24bit/48kHz, built-in microphone, NFC, A2DP, AVRCP, HFP, microUSB, 3.5mm jack input, output 2x 3.5mm jack
Headphone Amplifier - Impedance up to 600 ohms, 106 db noise from a distance, miniature design (25g), battery life up to 25 hours, microUSB for PC and Mac, 3.5mm jack input, output 2 x 3.5mm jack
Compared to face masks, respirators protect you, more precisely your airways, against dangerous particles such as dust, aerosol, fumes, bacteria, (corona)viruses.