As we can see, from the appearance, except the color, the TD163 pager is a circle and TD172 is square. Since they are both with 20 pagers. Some people like the square one, some people like the circle one, then you have the decision of which one to choose. In addition, TD163 will save more space than TD172.
TD163 is IP33 waterproof level, TD172 is IP32. TD172 is IP32 waterproof level.
TD163 has 7 prompt notice modes. You can combine the buzzer, vibration, and flash freely. TD172 has two notice modes, Vibration+buzzer+flash, Vibration+flash.
TD163 can reach 500 meters in the open area. TD172 can reach 400 meters in the open area.
TD163 pager doesn’t have the cancel key, TD172 has the cancel key on the pager.
TD163 remind time is 0-200s, TD172 remind time is from 0-999s.
TD163 supports 999 pagers max, TD172 supports 998 pagers max.
TD163 pager has the LED with the number, TD172 has the print number on the pager.
Both of the pagers have a 300 Mha battery, it can last 18 hours in standby mode. One key to turn off all the pagers. Both keypads are touchable.
How to choose from those two models?
If you want a square one with 20 pagers, choose the TD172, if you want to have a circle with 20 pagers, choose the TD163.
If you want a longer range, choose the TD163. If you want to change the numbers freely, choose the TD163, so you can change the number of pagers.
If you want to have a cancel key on the pager, choose the TD172.
If you still have any concerns about those two models, feel free to email us at firstname.lastname@example.org.