Speed bump

Traffic calming

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Speed table

speed bump中文

We use cookies and similar tools that are necessary to enable you to make purchases, to enhance your shopping experiences and to provide our services, as detailed in our Cookie notice. We also use these cookies to understand how customers use our services (for example, by measuring site visits) so we can make improvements.If you agree, we'll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie notice. Your choice applies to using first-party and third-party advertising cookies on this service. Cookies store or access standard device information such as a unique identifier. The 96 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. Click "Decline" to reject, or "Customise" to make more detailed advertising choices, or learn more. You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy notice.

Adjust the microphone sensitivity to suit your microphone and classroom, (i.e. tinker with the slider until you like the sensitivity). Your browser will prompt you to ask if it is okay to connect to your microphone. This page has an SSL certificate for security. No sound data is sent from your machine to any other.

If you agree, we'll also use cookies to complement your shopping experience across the Amazon stores as described in our Cookie notice. Your choice applies to using first-party and third-party advertising cookies on this service. Cookies store or access standard device information such as a unique identifier. The 96 third parties who use cookies on this service do so for their purposes of displaying and measuring personalized ads, generating audience insights, and developing and improving products. Click "Decline" to reject, or "Customise" to make more detailed advertising choices, or learn more. You can change your choices at any time by visiting Cookie preferences, as described in the Cookie notice. To learn more about how and for what purposes Amazon uses personal information (such as Amazon Store order history), please visit our Privacy notice.