Pass Callback function to module.exports?

I've written an USB Detection code with module exports , and I'd like to send also a callback function on the event fires.

Here :

module.exports = class USBDetection {
  constructor() {
    this.usb = require('usb');
    this.usbDetect = require('usb-detection');
  }

  startMonitoringDevices() {
    this.usbDetect.startMonitoring();
    // Detect add/insert
    this.usbDetect.on('add', function(device) {
      callback('add', device);
    });
    this.usbDetect.on('add:vid', function(device) {
      callback('add', device);
    });
    this.usbDetect.on('add:vid:pid', function(device) {
      callback('add', device);
    });

  }
};

How can I pass callback to the module ?

module.exports = callback => {
    const usb       = require('usb');
    const usbDetect = require('usb-detection');

    return {
        usb,
        usbDetect,
        startMonitoringDevices: () => {
            // Detect add/insert
            usbDetect.on('add', function(device) {
                callback('add', device);
            });
            ...
            usbDetect.startMonitoring();
        },
    };
};