Heltec wireless stick V3 Lora kit sleep mode , what number on pins are considered external wake-up pins?

Hello everyone having problems finding information RTC pins when the heltec wireless stick V3 is in sleep mode , what are the external wake-up pins? Also what’s the TTL level , is it low when between 0 V and 0.8 V and “high” when between 2 V and 5V?IMG_20230624_063131598|374x500