Longest functioning tin can telephone
- Who
- John Hems
- What
- 373.79 metre(s)
- Where
- United Kingdom (Sidmouth)
- When
- 08 October 2022
The longest functioning tin can telephone is 373.79 m (1,226 ft 4 in) and was achieved by John Hems and Sidmouth Science Festival (both UK), in Sidmouth, Devon, UK, on 8 October 2022.
This attempt was organised to promote STEM subjects into the community, and was just one of many highlights during the 10-day festival.