ACA 1230 Real Time Clock Upgrade Kit is a Real Time Battery Backed Up clock chip and coin battery for the ACA 1230 Accelerator only. Note: ACA 1232 and ACA 1220 uses the alternative Real Time Clock Module Clock chip and battery can be installed onto the sockets provided on the accelerator. Package Contents: OKI M6242B (Or Equivalent) Clock Chip CR1220 Coin Battery Don't Forget: ACA 1230/28 Accelerator