Features: (SF03R)
* Wide range of applications: Suitable for DIY home security systems. Many burglaries are committed through doors and windows, especially side doors, back doors and garage doors.
* Loud volume: This access control device has a loud 108 decibel alarm, which helps to deter intruders, wake up or remind you at home, and may alarm neighbors.
* Wireless remote control: The wireless door and window alarm has four modes - arm/disarm/emergency/doorbell mode, which can be controlled by the remote control, and the wireless control range can reach 49 feet.
* Safety: It is not only a DIY door and window alarm, but also can be used as a doorbell/pool alarm to ensure the safety of children, or notify you when children/pets or visitors enter or exit, as well as an emergency alarm system for the elderly/patients.
* Low battery reminder: When the remote control is low in power, the remote control light flashes and dims or the remote control distance becomes shorter, prompting you to replace the battery. When the receiving host is low in power, the LED flashes once per second, prompting you to replace the battery.
* High sensitivity detection: The door magnet is sensitive to the door and window, and the alarm will be triggered immediately when the door and window are opened about 1 cm.
Note: The host and remote control are paired by default when shipped.
Specification: (SF03R)
Name: Home Window Alarm Kit
Communication frequency: 433MHz (less interference than 315MHz)
Installation gap distance (distance between host and magnet): <1cm
Alarm volume: 108dB (30cm test)
Power supply: Host: 2*AAA alkaline batteries provided by the customer, remote control: 1 12V 27A alkaline battery
Installation method: glue fixation
Size: host 43*85*15mm, remote control 33*61*13mm, magnetic strip 10*50*11mm
Color: white
Packing included:  (SF03R)
1 * Door Alarm
1 * Magnet Sensor
1 * Remote Control
3 * Adhesive Tape
1 * User Manual

Features: (SF04R)
* Loud volume: This access control device has a loud 110 decibel alarm, which helps to deter intruders, wake up or remind you at home, and may alarm neighbors.
* Wireless remote control: The wireless door and window alarm has four modes - arm/disarm/emergency/doorbell mode, which can be controlled by the remote control, and the wireless control range can reach 82 feet.
* Low battery reminder: When the remote control is low in power, the remote control light flashes and dims or the remote control distance becomes shorter, prompting you to replace the battery. When the receiving host is low in power, the LED flashes once per second, prompting you to replace the battery.
* 10 levels of adjustable sensitivity: The sensitivity level can be adjusted according to different scenes and occasions. Note: The factory setting is the highest sensitivity - the first gear sensitivity.
* Security: Not only a security/anti-theft alarm, but also a doorbell. In doorbell mode, the host makes a "ding dong" sound when the vibration alarm detects vibration.
* Add more remote controls and sirens. You can program multiple remote controls for one sirens, or program one remote control for multiple sirens.
Multiple remote controls + host pairing method:

Install the host with AAA battery, press and hold the "bell" button of the remote control for about ten seconds, and hear a "beep". Short press the "arm and lock" button of the remote control, and hear two "beeps". Short press the "disarm and unlock" button of the remote control, and hear a "beep" to indicate that the pairing is successful. 
Specification: (SF04R)
Name: Wireless Vibration Alarm Set
Material: ABS
Function: anti-theft
Working frequency: 433 MHz
Power supply: Host: Customers provide 2*AAA alkaline batteries, remote control: 1 12V 27A alkaline battery
Standby time: more than 12 months
Remote control distance: 20~50 meters
Application: Door/window/bicycle/motorcycle
Installation method: Glue fixation, it is recommended to install vertically or horizontally on the front, and it is not recommended to install sideways, the sensitivity will be reduced.
Size: Host: 85*43*14mm, remote control 33*61*13mm
Color: black
Packing included:  (SF04R)
1 * Door Alarm
1 * Remote Control
2 * Adhesive Tape
1 * User Manual


Note:
1. Due to manual measurements and slight color variations, please allow 1-3 cm (0.4-1.18 inches) difference to suit different display settings.
2. Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand.