Features: Stable signal transmission and long distance: the call system is highly resistant to interference, and the system signal range covers an open area of 300 feet. Waterproof button design: durable wireless call button and ABS housing, can use the button with the receiver together, plug and play. Easy to use: The wireless call button can be easily installed on each table or wall with a sticker or in a pocket. Long-lasting: Customers or patients can get help quickly and easily, up to 15 days standby time for Receiver. Application: used in restaurants, nursing homes, cafes, supermarkets, hotels, hospital wards, emergency centers, banks, schools, factories, construction sites. Receiver: Rechargeable design, self-contained charging cable, more convenient to use. LCD display, support time display and English user friendly menu, easy to operate. With a variety of ways to remind, flash, vibrate and ringtones. The open area has a transmission distance of 300 meters. Widely used in banks, restaurants, hotels, factories, hospitals, offices, leisure clubs, etc. Using a 3.7V polymer lithium battery, the theoretical standby time is about 15 days. With a sleep function. The clock and alarm functions are still active but do not receive calls in this mode, which reduces power consumption. Receive call signals directly without the need for a host or control center. With automatic reset function, the number can be deleted automatically. There are two ways to remind you of vibration and music. Can display 4 digits and store 16 numbers to scroll display. Transmitter: Place it on a table or wall, press the button, the indicator lights up, and send a signal to the receiver. Stylish and beautiful, the silicone button is waterproof and comfortable to use. With small size, light weight, easy to carry and use. Use professional communication components, to insure the stability of signal transmission. World-level coding mode, no messy code. Resistance to temperature and humidity changes, safety, stability, and high reliability. Adopt SAW DEVICE aeronautical communication special parts, to insure stable signal transmission, and the launch distance can reach 1 km (in an open area) With built-in channel anti-aliasing function, and built-in timing circuit design. Specification: Color: as picture shown Quantity: 10 transmitters + 1 receiver Voltage:100~240v Plug Type: EU Plug, AU Plug, UK Plug, US Plug(optional) Receiver: Host Capacity: 500 Language: Support Chinese and English Prompt Mode: vibration, buzzer, flashing Receive Sensitivity: 110dBm Storage Capacity: 16 groups Power: 3.7V 250mAh lithium battery (included) Standby: 15 days Receiving Frequency: 433.92MHz Transmitter: Material: ABS plastic Battery: 23A 12V battery (included) Package List: 1 * Receiver (Watch) 10 * Transmitter (Button) 1 * USB Cable 1 * Charging Plug 10 * Double-Sided Tape 1 * Instruction Manual 1、Stable signal transmission and long distance: the call system is highly resistant to interference, and the system signal range covers an open area of 300 feet. 2、Waterproof button design: durable wireless call button and ABS housing, can use the button with the receiver together, plug and play. 3、Easy to use: The wireless call button can be easily installed on each table or wall with a sticker or in a pocket. 4、Long-lasting: Customers or patients can get help quickly and easily, up to 15 days standby time for Receiver. 5、Application: used in restaurants, nursing homes, cafes, supermarkets, hotels, hospital wards, emergency centers, banks, schools, factories, construction sites