Are you looking for a professional and practical emergency button? , ! Our emergency button must meet your needs. This caregiver pager is made of sturdy material, durable and sturdy for use. Fine workmanship practicality and durability. Features -Color:Black -Material: -Size:6.50X6.50X5.10cm/2.55X2.55X2.00in Transmitter power consumption: <=10mW Receiver working voltage: 100- 50/60Hz Receiver power consumption: 0.5W Volume: 25-85dB Working frequency: 433MHz Transmitter Battery: 12V 23A - emergency alert, wear this emergency button with lanyard, you can press whenever you need. - Small in size, both the host and receiver will not take up much space. - Volume and tune adjustable, easy to meet your different needs during use. - No need for network, no wiring, a good elder/disabled helper for home use. - Strong penetration, receiving distance can reach as long as 300 meters in . Package list: 1 x receiver 2 x 2 x lanyards 2 x holders