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KEYES Knock Module for Arduino
Brand KEYES Model N/A Quantity 1 Color Red + white Material RF4 Features Fool-proof interface Specification With signal output indication; Single channel signal output; With installtion hole£¬ convenient to install; Circuit board output switch£¬ can connect singlechip IO port; Working voltage: DC 3~5V; Great for teaching demonstration or product development Application Singlechip development English Manual/Spec Yes£¬ http://pan.baidu.com/share/link?shareid=479901&uk=2500272204 Packing List 1 x Module 1 x Sensor connecting cable (21cm)