Feature:
It can be used to call / remind someone far away from you. Especially for person with hearing disturbance.
Wireless control.
You can control the receiver with transmitter (remote control) from any place within a reliable distance; the wireless signal can pass through walls, floors and doors.
Reliable control: The transmitter (Encoding) and the receiver (Decoding) use an 8-bit code.
One/several transmitters can control one/several receivers simultaneously.
If you use two or more receivers in the same place, you can set them with different codes.

Vibration Receiver:
Model No.: Z-02
Mode: Vibration
Decode: Learning code
Power Supply (Operating Voltage): AAA 1.5V Battery
Size: 58mm x 36mm x 15mm

Transmitter:
Model No.: CS-4
Channel: 4 CH
Remote Control Distance: 50m / 150ft (theoretically)
Encode: Fixed code by soldering
Unit size: 60mm x 25mm x 15mm
Power Supply: 1 x 27A -12V battery (included, can be used for 12 months)

Usage:
1) Press button A: The receiver vibrates once.
2) Press button B: The receiver vibrates twice.
3) Press button C: The receiver vibrates three times.
4) Press button D: The receiver vibrates four times.

Package Include:
1 x Vibration Receiver: Z-02 (4 Vibration Modes)
1 x Transmitter: CS-4
1 x User manual