Walkie talkies long range; RT86A business two way radios high power output can withstand the signal attenuation of concrete buildings better than consumer-grade 2 way radio; maintain clear communication; and the communication distance can cover 700, 000 square feet; suitable for large construction sites; warehouses; etc ^^ Compatible with RT86; when the radio walkie talkie is powered off; press and hold the PF2 button for 3 seconds to turn it on and switch to the frequency of RT86 2 way radios long range; achieving quick compatibility ^^ One-touch group call; team communication is very important in the construction process; business walkie-talkie's one-touch group call helps you quickly contact team members in different channels to understand the progress of various aspects of the project; emergency matters; etc; to improve team communication efficiency; long press the PF2 button on the 2 way radio for 3 seconds to turn on the function; and press the PTT button to use ^^ Ultra-long battery life; 2500 mAh battery provides 17 hours of battery life; 120 hours of ultra-long standby time; maintains stable and long-term communication; rechargeable two way radio supports USB-C charging; convenient and fast ^^ Heavy duty two-way radio; the RT86A rugged radio walkie talkie shell is made of ABS material; which is strong and drop-resistant; and can withstand daily wear and tear and several accidental drops in complex working environments