Garmin GLO2 Portable GPS/GLONAS Sensor (used) Black.

GPS receiver to enable your iphone or android to determine position when out of mobile cell range. Such uses could be marine, aviation or extreme terrain. Uses GPS/GLONASS and will only receive ‘line of sight’ signals, so will not work underground or even indoors if the receiver cannot ‘see’ the satellite constellation. Tested and working 17/7/25 Does not include mounting pad - only car charger, usb charger, instructions and receiver

eBay