TEMO Spare Magnetic Safety Key For The TEMO 1000. Having a spare key is always a good idea. That's why TEMO offers a magnetic key with lanyard for your TEMO 1000 in case you misplace your original one or just want to have a spare on your keyring. The lanyard makes it safer to use when you're on the water and helps the key float if dropped in the water. This key includes a magnet that fits directly onto the TEMO 1000 for switching it on.