| Home |    | Products |    | About us |    | Contact us |                 update Feb.09.2023.  


M-840W Wristwatch call


Just Press the Bell button direct calling to pagers and smartphones.

The M-840W Wristwatch transmitter is designed to directly page the nurses or health care

persons with a simple Red button depressing.

No need to dial telephone to get the helps.

And the installation is simple without any wires connections.

The operation is easy for the quick emergency aids.

Calling Nurse for helps ? simply just press the Red  button.


It is easy to program and set up the desired pager frequency, capcode, data rate, repeat time etc. functions.


      ** Main Function **

  • Waterproof IP-65

  • Compact portable size

  • Quick paging

  • Direct calling to pagers

  • Simple operation

  • Internal antenna

  • Wristwatch type

  • Low battery warning indication and sending out battery low aleart message

  • Long distance

  • Long battery life

  • Frequency synthesized 303-915MHz

  • CE and FCC approved

  • Option IoT gateway on internet

**  Specifications of M-840W  **

Paging format: POCSAG
Frequency: 303-915MHz Frequency synthesized.
Baud rate 512/1200/2400 bps
Message: Alphanumeric (Max 40 Character).
RF output 1-12 mW. Programable.
Modulation: FSK ,NRZ.
Deviation: 4.5K
Stability: ±1 ppm. Frequency Oscillator by 1ppm TCXO.
Pager Capacity 1 Button. and 1 capcode for battery alarm.
Operating Voltage: 1x CR-2450 type battery (3V)
Programming: via USB with P/C.
Battery life about 2 year ( 10 Time per day).
Case Size: 24mm X 39mm X 17mm.
Model Weight: 25 g (with battery).
Programming screen

Wireless Devices Inc. Taiwan.

Sales Department. e-mail:

Tel.(8862) 8502 0001