1.4G telephone.
2.Metal body,rugged and temperature bearable.
3.Handset free, 5W loudspeaker.
4.Stainless steel vandal resistant button.
5.With or without keypad optional.
6.Waterproof defend grade IP66.
7.Body with grounding connection protection.
8.Support hotline call, stop if the other party hang up.
9.Built-in speaker, noise canceling microphone.
10.Indicator will flash when there is an incoming call.
11.Built-in rechargeable battery with solar powered panel.
12.Embed style and hanging style can be chosen.
13.Time out function optional. call duration limit (1-30 minutes).
14.Color: Yellow or OEM.
15.Temper-proof housing.