will tell you what break point you are on

responsive-indicator

/*
Responsive Indicator
==================================================
Raystation
http://rayuen.com
*/

.responsive-indicator {
  width: 20px;
  height: 20px;
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 9999;
  opacity: 0.9;
  border-radius: 50%;
  background-color: rgba(0,0,0,1);
  -webkit-transition: background-color 1s;
  -moz-transition: background-color 1s;
  transition: background-color 1s; 
}

/* Larger than 960px (devices and browsers) */
@media only screen and (min-width: 960px) { 
  .responsive-indicator { background-color: rgba(255,0,0,1); } 
}
/* Smaller than standard 960 (devices and browsers) */
@media only screen and (max-width: 959px) { 
  .responsive-indicator { background-color: rgba(0,0,0,1); } 
}
/* Tablet Portrait size to standard 960 (devices and browsers) */
@media only screen and (min-width: 768px) and (max-width: 959px) { 
  .responsive-indicator { background-color: rgba(0,0,0,0.8); } 
}
/* All Mobile Sizes (devices and browser) */
@media only screen and (max-width: 767px) { 
  .responsive-indicator { background-color: rgba(0,0,0,0.5); } 
}
/* Mobile Landscape Size to Tablet Portrait (devices and browsers) */
@media only screen and (min-width: 480px) and (max-width: 767px) { 
  .responsive-indicator { background-color: rgba(0,0,0,0.3); } 
}
/* Mobile Portrait Size to Mobile Landscape Size (devices and browsers) */
@media only screen and (max-width: 479px) { 
  .responsive-indicator { background-color: rgba(0,0,0,0.1); } 
}