• Includes 1 receiver and 2 remote transmitter buttons. • Ideal for elderly care or small shops with multiple entrances. • More than 50 different melodies to choose from. • Wireless range of 150 to 300 meters in open areas. • Four adjustable volume levels, from 25 dB to 110 dB. • Waterproof transmitter button with IP33 rating, suitable for outdoor use. • The receiver easily plugs into a power outlet without the need for batteries. • CE, FCC, and RoHS certified. • Includes double-sided adhesive, anchor screws, and a 12V alkaline battery for the transmitter. • Product dimensions: 3.8 cm wide, 8.9 cm high, and 8.3 cm long. • Product weight: 0.142 kg.