A wearable electronic device is discussed. The device has a housing and a processor in the housing. The processor can enable the wearer of the device to select different operations from an onscreen display. The device also has a communication circuit in the housing to transmit wirelessly to another device cooperating with the electronic device. The device has a microphone hole penetrating the housing to a microphone, a microphone seal component, and a waterproof material in the housing. The microphone seal component has channels and when compressed against the waterproof material can i) allow sound waves in air to pass through to the microphone inside the housing behind the waterproof material and the microphone seal component, ii) form a water tight seal for the microphone hole penetrating the housing, and iii) provide an air pressure equalization mechanism between internal pressure inside the housing and atmospheric pressure external to the housing.