Ycall/KOQI has strong development ablity for wireless calling system . We accept OEM .

Now we will introduce some model of 2019 newest waterproof button.

characteristics :
1. full waterproof
Built-in large silicon pad, after a lot of total body water experiment waterproof effect beyond imagination .
2.beautiful design
case color has black,white
rubber color has red,black,green,blue,black. If need any other color also acceptable.
3.stable registeration
adopt SAW DEVICe aeronautical communication special parts make sure that stability of transmission.It has built-in channel anti-mixing function ,and is equipped with built-in timming circuit design,with superiorly stable login mode,the phenomenon of messy code doses not appear.
4. Anti-temperature and humidity changes
It is not affected by cloudy days, thunderstorm and environmental changes, and has powerfull function of

anti- temperature,humidity,changes with security,stability and high reliability.