The ACR ResQlink 400 PLB with built-in buoyancy and integrated strobe system advancements is the new PLB to the ACR ARTEX portfolio. It has three levels of signal transmission through GPS positioning, a powerful 406MHz signal and 121.5MHz homing beacon capabilities. The ResQlink 400 has a built-in strobe light and infrared strobe system to facilitate rescues at night or during low visibility. To activate, simply deploy the antenna, press the on button and the beacon will do the rest! Rescuers can be guided within 100 meters or less of your location. The new ACR ResQlink 400 is designed with multi-function clips to be used in conjunction with the distress beacon; providing numerous wearability options for a variety of usage applications. This ACR PLB operates with class 2 (non-hazmat) lithium batteries, which must be replaced every 5 years. Once the PLB has been activated the battery will typically exceed 24 hours transmitting a GPS signal.