How to set time in datetime field in extjs or sencha

I need some help , My question is that.. is there any option to set time also with date in extjs datetime field. please look below image. herer is my code for datetime picke.

{
      {          xtype: 'datefield',
                fieldLabel: 'Posted At',
                //labelWidth: 140,
                format: 'd-M-Y H:i',
                flex: 1,
                name: 'postedAt',
                allowBlank: false,
                value: new Date(),
                listeners: {
                    scope: this,
                    select: function (f, v) {
                    }
                }
            },