Amazon Echo Dot (2nd Generation) 

General Features:
Color: Black
2nd Generation
Hands-free, voice-controlled device with a small built-in speaker
Connects to the Alexa Voice Service to play music, make calls, send and receive messages, provide information, news, sports scores, weather, and more—instantly
Connect your speakers or headphones using Bluetooth or through a 3.5 mm audio
Tucked under the light ring is an array of seven microphones that use beam-forming technology and enhanced noise cancellation
Alexa—the brain behind Echo Dot—is built in the cloud, so it is always getting smarter
Skills add even more capabilities like ordering a pizza from Domino's, requesting a ride from Uber and more 
Simple to set and use
Sleek and compact design 
Power LED 

Technical Details:
Wi-Fi Connectivity: Dual-band Wi-Fi supports 802.11 a/b/g/n (2.4 and 5 GHz) networks. Does not support connecting to ad-hoc (or peer-to-peer) Wi-Fi networks
Bluetooth Connectivity: Advanced 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.
Audio: Built-in 0.6" speaker for voice feedback when not connected to external speakers. 3.5 mm stereo audio output for use with external speakers (audio cable not included)

Controls:
Microphone off button
Action button
Volume +
Volume - 

Ports:
Micro USB
3.5mm Aux audio 

Power Adapter Specifications:
Input: 100-240V ~ 0.3A, 50/60Hz
Output: 5.2V==1.8A 

Dimensions:
1.3 x 3.3 x 3.3-inches (H x W x D)
Weight: 5.7 oz.

Product Requirements:
Available power outlet
Echo 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
Certain skills and services may require subscription or other fees

Grade B 
Device is in good condition. Will show slight signs of scratches, dents or scuffs. These blemishes will mostly be located on the bezel, rear, and possibly minor scratches on the screen if it has one. This device will be fully tested and fully functional.