youdao

youdao

youdao

This solar water heater is easy to build and operate.

VOA: special.2011.04.25

Unlike the majority of existing GPS watches on the market that feature multiple small and hard-to-operate buttons, the one-button control is easy to operate while moving and can be easily controlled in all weather conditions and while wearing gloves.

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The touchscreen is easy to operate, even with a gloved finger and when wet.

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"Systems are getting more technical, so making them easy to operate is a strong selling point, " says Bystrom.

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