Downloadable MP3</br>Adjustable volume?? sleep mode and mute to adapt use for time of day</br>High-quality sound (90 db); comes with 8 tunes</br>Portable or wall mount option (included)</br>Range up to 450 feet</br></br>Product Description</br></br>Never miss a delivery or visit again.  This Series 9 Portable Doorbell represents the finest in Honeywell design with innovative features ranging from downloadable tunes and custom visual alerts to the peace and quiet of a mute timer.  You can also connect doorbells via Honeywell ActivLink for eve more extensive range and versatility.</br><br/>http://www.amazon.com/gp/product/B01HNSFTBQ