Quartz timing crystals, electronic timer plug instructions, timer switch on/off

 CM315D Series 32.768 kHz ±20 ppm 9 pF - 40 to +85 °C Tuning Fork Crystal Unit

https://www.futureelectronics.com/p/electromechanical--timing-devices--crystals/cm315d32768dzct-citizen-finedevice-1395243