The Zwift Click & Cog upgrade kit allows anyone with aZwift Readytrainer to replace their cassette with a Zwift Cog and includes a Swft Click for virtual shifting, allowing riders to fully immerse themselves in Zwift. Zwift Ready trainers from Wahoo include: KICKR CORE; KICKR v6 (no backwards compatibility) & KICKR MOVE. Whats included?1x Zwift Cog V214-tooth single sprocket1x Zwift ClickCommunication: Bluetooth®Power: Battery, coin cell CR2032Product dimensions: 47 x 47 x 13mmBox dimensions: 66 x 68 x 32mmProduct weight: 51 gramsBattery life: >100 hoursZwift subscription is NOT included.