Customer service：
400 069 8158
Call for help,
connect to each terminal, send alarm signals and
voice prompts immediately,
simple installation, no wiring
Lora wireless communication
Model : NH-WS01
Product size : host end: diameter 71.4 mm thickness 27.4mm product size : button end: 35.2*56.7*12.9 mm signal : LoRa wireless signal battery : built-in lithium battery, battery life ≥ 1 year, Type-C charging Installation instructions : support wall and equipment with hanging board installation
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