Shimano GRX RX825 Di2 1 x 12 Gearset Bundle - a complete matched component package.
This bundle includes:
Right Lever And Calliper: ST-RX825 GRX Di2 12-speed STI bled with BR-RX820 calliper, right front
Left Lever And Calliper: BL-RX825 GRX hydraulic disc brake lever bled with BR-RX820 calliper, left rear / ST-RX825 GRX Di2 2-speed STI bled with BR-RX820 calliper, left rear
Rear Mech: RD-RX827 GRX Di2, 12-speed rear derailleur, Shadow ES, for 51T single
Battery: BT-DN320 Di2 wireless rear derailleur battery
Charger: EC-DN100 Di2 wireless rear derailleur battery charger