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XH-GSM0922
- GSM功能说明，远程短信控制继电器的开和关，带有定时功能-Function GSM remote control relay messages on and off, with timing function
3.3-compatible-with-5-v-relay
- 本文介绍了3.3与5V继电器得使用方法与使用范围-This paper introduces the method of 3.3 and 5 v relay have to use and the use scope