● Voltage: DC3.0V

 ● Transmission Method: NB-loT（Telecom/Mobile/Unicom)

 ● Frequency: B1/B3/B5/B8

 ● Rate: Upstream 16kb/s, downstream 25kb/s

 ● Standby current: <0.06uA

 ● Standby time: 3 years (with no more than 5 times signal transmission per day)

 ● Heartbeat time: Once per day

 ● Battery capacity: Lithium-Management battery DC3.0V 1400mAh

 ● Low battery alarm: support

 ● Alarm current: <100mA

 ● Temperature: -10℃～55℃

 ● Humidity: maximum 95%RH (no condensation)