Echo Dot (4th Gen), Smart speaker with clock and Alexa, Glacier White

  • Meet Echo Dot with clock – Our most popular smart speaker with Alexa. The sleek, compact design delivers crisp vocals and balanced bass for full sound.
  • Perfect for your nightstand – See the time, alarms, and timers on the LED display. Tap the top to snooze an alarm.
  • Ready to help – Ask Alexa to tell a joke, play music, answer questions, play the news, check the weather, set alarms, and more.
  • Control your smart home – Use your voice to turn on lights, adjust thermostats, and lock doors with compatible devices.
  • Start Routines with your motion – Turn on compatible lights, play your Flash Briefing, or turn on the coffee maker when you walk into the room.
  • Connect with others hands-free – Call friends and family who have the Alexa app or an Echo device. Instantly drop in on other rooms or announce to the whole house that dinner’s ready.
  • Designed to protect your privacy – Amazon is not in the business of selling your personal information to others. Built with multiple layers of privacy controls including a mic off button.

Technical details

Echo Dot (4th gen) with clock

Size3.9” x 3.9” x 3.5” (100 x 100 x 89 mm)
Weight12.3 oz (351.3 g) Actual size and weight may vary by manufacturing process
Wi-Fi connectivityDual-band Wi-Fi supports 802.11a/b/g/n/ac (2.4 and 5 GHz) networks. Does not support connecting to ad-hoc (or peer-to-peer) Wi-Fi networks.
Amazon SidewalkA shared network that can simplify Echo device setup and can help your device reconnect to your Wi-Fi router when you update your password or network name. Sidewalk uses a small portion of your internet bandwidth to provide these services to you and your neighbors, and is enabled on your device unless you have previously disabled the setting.
Bluetooth connectivityAdvanced Audio Distribution Profile (A2DP) support for audio streaming from your mobile device to Echo Dot or from Echo Dot to your Bluetooth speaker. Audio/Video Remote Control Profile (AVRCP) for voice control of connected mobile devices. Hands-free voice control is not supported for Mac OS X devices. Bluetooth speakers requiring PIN codes are not supported.
Audio1.6” speaker. 3.5 mm line out for use with external speakers (audio cable not included).
DisplayLED Display
System requirementsEcho Dot comes ready to connect to your Wi-Fi. The Alexa app is compatible with Fire OS, Android, and iOS devices and also accessible via your web browser. Supported operating systems. Certain skills and services may require subscription or other fees.
Setup technologyAmazon Wi-Fi simple setup enables customers to connect smart devices to their Wi-Fi network in a few easy steps. Wi-Fi simple setup is another way Alexa is always getting smarter. Learn more about Wi-Fi simple setup

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Ratings4.7 out of 5 stars(874,496)4.7 out of 5 stars (412,705)4.7 out of 5 stars (106,164)4.6 out of 5 stars (31,107)
Alexa built incheck markcheck markcheck markcheck mark
Speakers1.6″ speaker1.6″ front-firing speaker3.0″ woofer and dual front-firing 0.8″ tweeters1.0″ tweeter, three 2.0″ mid-range speakers, and 5.3″ woofer
Line in/out3.5 mm line out3.5 mm line out3.5 mm line in/out3.5 mm or mini-optical Toslink line in
Dolby technologyDolby audioDolby Atmos
Built-in Zigbee smart home hubcheck markcheck mark
LED clock displayFeatured on Echo Dot with clock

Using Uultrasound Technology to Detect Motion

Imagine walking into your kitchen in the morning and having Alexa turn on the lights, adjust the thermostat, tell you the traffic report, and brew your coffee. All without you having to say a word. This is now possible on Echo (4th Gen) and Echo Dot (4th Gen) devices with ultrasound motion detection. Ultrasound technology can be used to detect movement near the device. When this happens, Alexa can then activate features you’ve enabled such as an Occupancy Routine.

What is ultrasound?

Ultrasound is a high-frequency sound that is not audible to humans. It is used in many fields today for the purposes of detecting moving objects and proximity. For example, some cars use ultrasound technology to enable self-parking. It’s also found in nature—dolphins and bats both use ultrasound for echolocation to sense their surroundings.

How does ultrasound motion detection work on Echo?

When a feature that uses ultrasound motion detection is enabled on a 4th Gen Echo or Echo Dot, the device will emit an inaudible ultrasound wave through its speakers which reflects off of nearby objects in the room. These reflections travel back to the device’s microphones which then detect if movement has occurred. If movement is detected, Alexa will activate an enabled feature such as initiating an Occupancy Routine or alerting a caregiver about movement in a loved one’s home.

Features that use ultrasound motion detection

Occupancy Routines

An Alexa Routine is a shortcut—a way to have Alexa perform actions with a single request, or at a preset time. Occupancy Routines use ultrasound motion detection instead of a verbal request to prompt a Routine for even greater convenience. Learn more about how to set up Occupancy Routines.

Alexa Together (formerly Care Hub)

With Alexa Together you can, with permission, help care for loved ones remotely. With ultrasound motion detection on an Echo (4th Gen) or Echo Dot (4th Gen) in your loved one’s home, your Alexa Together activity alerts can also be triggered by motion. For example, you can receive a daily alert when the first activity or motion is detected near a device or if no interaction or motion has been detected near a device within a specific timeframe determined by you, such as between 7 am-9 am.

Privacy FAQs

We remain committed to protecting your privacy and keeping you in control. Here are some privacy questions you might have about ultrasound motion detection.

Is ultrasound motion detection always on?

That’s up to you.  Echo (4th Gen) And Echo Dot (4th Gen) devices have motion detection capability built-in but will only use ultrasound technology when you have enabled a feature that uses ultrasound motion detection, such as Occupancy Routines or Alexa Together (formerly Care Hub).
Ultrasound motion detection will not be available when your device’s microphones are turned off and the red light ring is illuminated.

How can I turn off ultrasound motion detection?

You can turn off ultrasound motion detection by going into Device Settings within the Alexa app and following these simple steps:

1) Open the Alexa app
2) Open Devices
3) Select Echo & Alexa, then select the individual device you want, then click the Settings icon
4) Select Motion Detection
5) Switch the Motion Detection toggle to DISABLED

Even though the toggle is in the CAPABLE position by default, the device will not emit ultrasound waves for motion detection until a feature that uses ultrasound motion detection, such as Occupancy Routines and/or Alexa Together (formerly Care Hub), is also enabled. When the toggle is in the DISABLED position, ultrasound technology will be disabled, removing the ultrasound signal from features that use it.

If you have multiple devices, you will need to disable motion detection for each device separately.

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