The Black Diamond Guide BT avalanche transceiver with its massive 60m circular range, an updated user interface, redesigned housing and soft-touch contact points for improved ergonomics and handling, is the industry-standard, professional-grade avalanche beacon, now with Bluetooth capabilities, so you can update their firmware at any point (what BT stands for). A truly solid avalanche transceiver aimed at those spending long periods of time in the mountains. It is not aimed at the once or twice a year user with only a basic training in transceiver search, we would suggest the Black Diamond Recon BT for this which is a simpler device.