Compatible with Alexa, Siri and Google Assistant voice control Plays high resolution audio;Frequency response 20 Hz to 20 kHz Bluetooth integrated Turn any speakers into a wireless zone. Operating temperature range - 41 degree to 95 degree fahrenheit Features the same wireless ease of use as our self-powered HEOS speaker models Featuring advanced Class D digital amplification in a sleek compact chassis This pre-owned or refurbished product has been professionally inspected and tested to work and look like new. How a product becomes part of Amazon Renewed, your destination for pre-owned, refurbished products: A customer buys a new product and returns it or trades it in for a newer or different model. That product is inspected and tested to work and look like new by Amazon-qualified suppliers. Then, the product is sold as an Amazon Renewed product on Amazon. If not satisfied with the purchase, renewed products are eligible for replacement or refund under the Amazon Renewed Guarantee.