SAN FRANCISCO, Sept 30 (Reuters) - Amazon ( AMZN ) on

Tuesday unveiled a refreshed lineup of devices optimized for

home security and its new artificial intelligence-infused Alexa+

voice assistant.

At an event in New York, Amazon ( AMZN ) showed off Echo speakers,

Fire TV streaming devices, a new Kindle reader and improved Ring

and Blink cameras.

Amazon ( AMZN ) is trying to drive interest in the new Alexa, which

it spent years updating with AI for better personalization and a

more conversational tone.

The Seattle firm said its new Echos, including smaller Dots

and Show devices with screens that range from $99 to $219, will

be enabled to work with Alexa+ and feature new silicon chips for

faster processing.

Amazon ( AMZN ) also rolled out improved cameras for its Ring devices

for better home security, including facial recognition to help

ward off unwanted visitors.