System Dashboard 4.1.14 -

: Monitor the battery levels of your Mac and connected Bluetooth peripherals, including Apple keyboards and mice.

: Monitor total, user, and system processor usage, along with active threads and tasks. System Dashboard 4.1.14

You can find more details or download the latest version from sites like InsMac or Macx . System Dashboard 5.1.1 download | macOS - InsMac.org : Monitor the battery levels of your Mac