W650 wireless wrist pager system 
1. Can show 4-digit number from 0001 to 9999
2. Can work with 100pcs 1-key or 3-key transmitters in MAX.
3. Can show different service type with calling number and show time when it's stand-by.
4. Can store 10 calls and can track the calls up and down.
5. Three reminder way: voice, vibrator, and voice with vibrator.
6. Battery is rechargeable.
Dimension: 65X44X19mm