Specs:

Height: 95 mm
Width: 66 mm
Thickness: 25 mm
Weight: 147g

Operating Temp: -30C to 60C
Operating Altitude: -100m to +6,500m (-328ft to +21,320ft)
Humidity Rated: MIL-STD-810F, Method 507.3, 95% to 100% cond.
Vibration Rated: Per SAE J1455

Battery: 3 x AAA Lithium
Standby mode: 94.7 days
SOS/HELP: 2.8 days
Track Progress: 4.3 days
Check OK/Custom Messages: 350 messages