Blackburn Atom SL 4.0

- Rear wheel digital wireless speed sensor, trainer-compatible
- Giant, 18mm-tall display
- Comprehensive ride data:
- Current, average and max speed with pace arrow, mph or km/h
- Trip distance/odometer
- Ride timer, 12/24hr clock, auto scan
- Super compact size, 56mm L x 40mm W x 15.2mm H
- 43g
- Mounts to handlebar or stem
- Available in 2 colors: black, white