Switel DH100. Features: Upon receiving any radio signal from the sensor or transmitter, it provides a flashlight and sound alarm. Loud and clear sound up to 90 dB with 32 selectable melodies. Bright, flashing LED lights. Selected operating modes: sound, light, sound and light. SUB-1G RF frequency with a wireless transmission range of up to 300 m (line of sight). Wireless handheld call button. After pairing with the receiver, it can send a wireless alarm signal to the receiver when someone steps on or leaves the mat. Small in size, it can stick to the wall or bed. Connect the sensor pad - bed, chair, or floor - to become a wireless sensor pad transmitter. Alternative use (without sensor pad): By adding the lanyard, it can function as a wireless handheld call button. It can send a wireless alarm signal to the receiver when someone presses the front button. Technical specifications: Contents: 1 piece. Product type: Wireless emergency call system. Product dimensions, width: 64.5 mm. Product dimensions, height: 120 mm. Product dimensions, depth: 30 mm.