The f1 focus is the most widely sold avalanche transceiver worldwide and is a long-standing favourite with professionals. The analogue technique of the f1 focus is completed by a visual search indicator. If you put on the f1 with its lightweight one belt system, the device is automatically switched on. There is only one rotary switch for switch-over from transmit to receive mode. Under ideal conditions the f1 can achieve a range of about 80 m. Thus the search path can be shortened and you get faster to the buried person. The number of beeps indicate at the same time if you have to face a multiple burial situation. The visual search indicator shaped in an LED arrow doesn't only show the right way, but also when you have to turn the volume control switch for adjusting the receiver sensibility. In case of several buried persons the volume control switch serves to isolate the signals and to ensure an easy and safe search. If you have several searchers, an earphone is highly recommended. The earphone plug-in is located at the waterproof, shock-resistant and ergonomic casing. In case of a second avalanche you can use the express emergency switch-over from receive to transmit mode. The f1 uses 2 easily available AA batteries. The waterproof, shock-resistant and ergonomic casing has an earphone connection socket. The f1 surpasses the demands of the European standard 300 718 and is also available as a set with earphone and bag. ORTOVOX recommends regular training to get familiar with the avalanche transceiver. We also strongly recommend that a transceiver must always be accompanied by a shovel and a probe on your tours. Specs: FUNCTION: Analog RANGE: Up to 80 m FREQUENCY: 457 kHz DIMENSIONS: 130 x 80 x 25 mm BATTERIES: 2 x AA LR6 Mignon 1,5 V WORKING LIFE: Transmitting: (@ 350 hrs), Receiving: (@ 40 hrs) WARRANTY: 5 years