Bluetooth-operated. Use Shelly BLU Button1 to activate Shelly Plus and Pro device Low battery consumption. Up to 2 years, perfect for those who are always on-the-go. Immediate response time. Response time fewer than 1 second. Multi-click action trigger. Execute up to 4 pre-set actions or scenes with simple click combinations. Visual & Sound hints. Sound and color indications inform you of its status and help you find it. Broad range. Shelly BLU Button1 has a range of 10m indoors and 30m outdoors