There's a rubber gasket around the inside of the lid which forms a dust and moisture resistant seal when the screws are tightened down. The lid is secured with 6 4mm screws (included)
If you are interested in Internet of Things (IoT) or M2M projects check our open source sensor platform Waspmote which counts with more than 100 sensors available to use 'off the shelf', a complete API with hundreds of ready to use codes and a low consumption mode of just 0.7µA to ensure years of battery life.
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