Datasheet

Works perfectly with any Raspberry Pi (or similar single board linux
computer) including the Pi 1, Pi 2, Pi 3, Pi 4, Pi Zero, A+, B+ etc.
 Fully assembled & tested PCB plugs directly into your Pi's GPIO
pins - No soldering required!
 Will keep time for 5 years or more
Note: This product does not come with a CR1220 coin cell battery.
Product Dimensions: 21.3mm x 20.0mm x 13.6mm / 0.8" x 0.8" x 0.5"
Product Weight: 2.7g / 0.1oz