Brand KEYES Model N/A Quantity 1 Color Red + black Material RF4 Features Works official Arduino products with fool-proofing interface and tailored wire. Specification With signal output indicator; Single-channel signal output; Output effective signal the indicator will light up; When it only tilts to one direction it can sense TTL output level. Switching value of the module output can directly connect to microcontroller IO port; With holes for convenient installation; Working voltage: 3~5V; Suitable for balancing test of vehicle body teaching experiments demonstration product development etc. Application For DIY project English Manual/Spec Yes http://pan.baidu.com/share/link?shareid=479895&uk=2500272204 Packing List 1 x Module 1 x Connection cable (21cm)