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83	83	* Operating Temperature: -40 ~~ 85°C
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86	86	(% style="color:#037691" %)**NB-IoT Spec:**
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88	88	* - B1 @H-FDD: 2100MHz
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93	93	* - B28 @H-FDD: 700MHz
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96	96	(% style="color:#037691" %)**Battery:**
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98	98	* Li/SOCI2 un-chargeable battery
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102	102	* Max boost current: 2A, 1 second
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105	105	(% style="color:#037691" %)**Power Consumption**
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107	107	* STOP Mode: 10uA @ 3.3v
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173	173	* The local NB-IoT network used the band that NDDS75 supports.
174	174	* Your operator is able to distribute the data received in their NB-IoT network to your IoT server.
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176	176	(((
177	177	Below figure shows our testing structure. Here we have NB-IoT network coverage by China Mobile, the band they use is B8.  The NDDS75 will use CoAP((% style="color:red" %)120.24.4.116:5683)(%%) or raw UDP((% style="color:red" %)120.24.4.116:5601)(%%) or MQTT((% style="color:red" %)120.24.4.116:1883)(%%)or TCP((% style="color:red" %)120.24.4.116:5600)(%%)protocol to send data to the test server.
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259	259	* (((
260	260	(% style="color:blue" %)**AT+URI=5,11,"mqtt",11,"coap",12,"0",15,"c=text1",23,"0" ** (%%) ~/~/Set COAP resource path
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261	261	)))
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284	284	* (% style="color:blue" %)**AT+CFM=1       ** (%%) ~/~/ If the server does not respond, this command is unnecessary
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287	287	[[image:1657330501006-241.png]]
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303	303	* (% style="color:blue" %)**AT+SUBTOPIC=NDDS75_SUB          **(%%) ~/~/Set the subscription topic of MQTT
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306	306	[[image:1657249978444-674.png]]
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322	322	* (% style="color:blue" %)**AT+SERVADDR=120.24.4.116,5600   **(%%) ~/~/ to set TCP server address and port
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325	325	[[image:image-20220709093918-1.png]]
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337	337	* (% style="color:blue" %)**AT+TDC=600      ** (%%)~/~/ Set Update Interval to 600s
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339		-(((
340		-(% style="color:red" %)**NOTE:**
341		-)))
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344		-(% style="color:red" %)**1. By default, the device will send an uplink message every 1 hour.**
	353	+(% style="color:red" %)**NOTE: By default, the device will send an uplink message every 1 hour.**
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911	911	(((
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914	914	(% style="color:#037691" %)**Dimension and weight**:
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916	916	* Device Size: 13.0 x 5 x 4.5 cm