Wireless Magnetic Door Entry Sensor Alarm Chime, Koostone Door Open Alert for Shop, Garage, Window Security for Kids, Elders Safety, Anti-theft, 2 x Transmitter + 1 x Receiver (Built-in Battery)

♥【Update Version-Rechargeable Receiver】The wireless receiver is built in battery (can not replaced), it is rechargeable ( recharging cable included) , save your trouble and money to replace the battery. The transmitter is battery-powered (battery included), it can be fixed with double-sided tape. This wireless door sensor is suitable for anti-theft, retail, visitor, nursing care, offices, factories, warehouses, home care and etc.
♥【How the Door Chime works】When the door/window opens, the sensor will be triggered to send out a signal, the receiver will receive the signal and alert. Koostone door sensor chime comes with 2 door/window sensors and 1 receiver, and each transmitter can set a separate sound with the receiver, which means you can know the front door or the back door opens without needing to go to see it.
♥【Easy Pairing】▲Step 1: Press the volume/backward/forward to select your avorite ringtone/volume. ▲Step 2: Press the “Volume” for about 5 seconds until it makes 1 “Ding”. ▲Step 3: Separate the sensor and magnet, the receiver will make 2 “Dings” with LED light flashing, pairing completed. (Note: * The pairing way of the other sensor is the same way, and you can choose another different ringtone. * Please check the manual for pairing).
♥【38 Ring Tones & 5 Volume (Plus Mute) & LED Flash for Hearing Loss】38 unique ringtones and 5 volume levels from 0% (mute) to 100%. Koostone door sensor alarm and window warning alert can meet all your needs. With the built-in LED indicator, the door entry chime receiver provides additional assistance to the hearing impaired. NOTE:The fixing distance of sensor and magnet should be LESS than 0.3 inches/0.8 cm, the closer the better, try to reset them closer if the receiver doesn’t work.
♥【Easy Installation & 490 Feet Long Operating Range & Quality Guarantee】Step 1: Press the volume/backward/forward to select your avorite ringtone/volume, pair the sensor and receiver. Step 2: Fix the magnetic sensor on your door/window by double tapes/screw, all done…Koostone wireless door chime provides a 60-day warranty and after sales service within 24 hours. Complete satisfaction guaranteed!