Retevis RB91 Long Range Radio Relay Communication Set, Portable Two-Way Radio Base Station(1 Pack) and Digital Handheld Walkie Talkies(2 Pack), for Parking Lot Tunnel Emergency

Ultra-long battery life; the RB91 relay has a built-in 15,000 mAh battery that can stand by for 7 days and work often for 10 hours; the RB24 walkie-talkie has a built-in 1,300 mAh battery that can stand by for 29 hours and work for 10 hours; whether you work indoors or outdoors; they’ll come up with long-lasting companion; the relay supports connection to outdoor power supply
Extend the distance; the RB91 relay helps the RB24 2 way radio break through the extreme communication distance and easily achieve long-distance calls; the walkie-talkie has a built-in relay function; it may be easily connected to up to 30 sets of RB24 walkie talkies; to achieve automatic networking; breakthrough distance limitations
Super penetration; low power consumption and strong penetration enable RB91 relay and RB24 two way radios to achieve clear calls in closed environments; such as subways; tunnels; basements; and so forth
Easy to pair; RB91 relay and RB24 2 way radios can also be connected out of the box; no additional settings are required; and communication is easier
Clear sound quality; digital technology provides clear sound quality; even at the edge of the signal; the sound quality is as clear as ever
All calls; when team members’ radios are on the same channel; press PTT for all calls; makes team organisation and coordination easier
Sturdy and durable; the casings of the walkie-talkie and relay are made of ABS material to withstand wear and tear; The RB24 test used to be dropped from a height of 1M more than 10 times and remained intact; supporting long-term use
Simple operation; press and hold the PF2 button for 3 seconds to switch the relay function of the RB24 walkie talkie on or off; press and hold button 6 for 6 seconds to switch the relay function of the RB91 relay on or off
Protected installation; use the provided screws and holes to hang on the wall; and be careful to avoid being close to strong electromagnetic field sources; the installation location must try to avoid high-density buildings; avoid co-channel effects; avoid direct installation near water sources; and must not be installed in places where the temperature is too high or too low; for relay equipment installed outdoors; lightning protection measures must be considered