The new Edge 540 and 840 carry over the user interface from the Edge 1040 and supply a more pleasant user experience
Garmin Edge 540 Cycling GPS In-Depth Review
Garmin - Bikerumor
Garmin Edge 540 Cycling GPS In-Depth Review
Garmin Edge 840 Solar review - Cycle Computers - GPS Computers
New: Garmin Edge 540 and 840; now with Solar! - Winter Park Cycles
What's the difference between the Garmin Edge 1040, 840 and 540 cycling computers? - BikeRadar
Garmin Edge 840 & 540 Released - Equipment - TrainerRoad
Garmin Edge 540 and 840 Series Update Features and Introduces Solar Options - Bikerumor
Garmin announces the Edge 540 & 840 series of cycling computers