The Doro 3500 is a flat alarm button available in four different attractive color combinations. When used with a Doro smartphone or a compatible classic Doro mobile phone, the wearer can trigger an alarm even when the phone is not nearby, such as in the shower or in another room. Worn around the wrist or neck, the alarm button is always within reach and is the perfect complement to the Doro Alarm application as well as Doro Connect and Care. It is compatible with certain Doro smartphones and the Doro Secure 580 (from software version 211).