(function(back) {
  o=Bangle.getOptions();
  Bangle.getPressure().then((p)=>{
    E.showMenu({
      "" : { "title" : "Altimeter Widget" },
      "< Back" : () => back(),
      'QNH: ': {
        value: o.seaLevelPressure,
        min: 100, max: 10000,
        format: v=>(v+"hPa\nAlt: "+(44330 * (1.0 - Math.pow(p.pressure/v, 0.1903))).toFixed(0)+"m"),
        onchange: v => {
          o.seaLevelPressure = v;
          Bangle.setOptions(o);
        }
      }
    });
  });
})