only keep user info and record. Device info and user info will be deleted. Restore default setting (keep user info and log), shift will be deleted.Select SysConfig>Restore, see Figure 3-46. Click or to select, and clickto confirm.Figure 3-463.7.4 Relay ModeRelay mode includes bell, lock and none modes. Bell, external bell device which ring according to set time. Unlock, when door is locked, during attendance you can control lock. Unlock holdtime can be set so when the door keeps unlocked over this time length, it will be autolocked. None, no relay mode, no any link.Select SysConfig>Relay Mode, see Figure 3-47.Figure 3-47