1:fine unique style sunglasses, with polarized lenses international, canblock 100% UV A, UV-B, UV-C and harmful blue light.
2:the lens can be turned on, lightweight frame material offers all-day comfort.
3:the machine can be one to one, one to many at the same time speaking
4:the effective communication distance up to 500M (depending on the specific terrain case may be)
5:the use of rechargeable polymer lithium-ion battery, charging with automatic protection
6:battery indicator, low battery warning
7:auto squelch, auto save power
8:the frequency parameter: 409.75MHz-410.1375MHz (the user can customize the relevant country band, the frequency can be 325MHz-385MHz or 390MHz-470MHz to choose between.)