... 2MB,6MB,10MB SRAMOperating powerRemovable, rechargeable 3.7 V 4000 mAh Li-ion batteryWorking hours’400 hours batch mode 70 hours ... WLAN modeBackup power3.0V7.0 mAh Lithium battery/ Data sustained 1week minimumAlertsProgrammable LED,buzzer,vibratorWireless CommunicationWLAN ...