The Retevis RT21 Walkie Talkies Long Range, Rechargeable are the ultimate solution for reliable on-site communication in various industries. Its design emphasizes audio clarity, ease of use, and durability, making it ideal for construction, facility management, hospitality, manufacturing, retail, and warehousing needs.

With 50CTCSS 208DCS, the RT21 ensures that irrelevant conversations do not interrupt your team's communication. This feature allows for quiet and efficient communication, enabling your team to stay focused on the task at hand.

Equipped with a powerful 1100 mAh battery, the RT21 provides up to 12 hours of uninterrupted use. This battery life is more than sufficient for a standard work shift, ensuring that your communication devices won't let you down when you need them the most.

The 2 Pin acoustic tube headset included with the RT21 allows you to maintain crystal-clear calls even in noisy environments. Additionally, the durable belt clip and hand strap make it convenient to carry the radio with you wherever you go. The charging base and adapter provide added convenience by allowing you to charge the radio anywhere.

All RT21 radios are pre-programmed and ready to use straight out of the box. This version is certified and meets all FCC standards, ensuring its quality and reliability. The FCC certified number for this radio is 2AAR8RETEVISRT21.

The RT21 is compatible with a wide range of Retevis 16 channel FRS walkie-talkies, including H-777, H-777S, RT15, RT18, RT19, RT22, RT68. This compatibility allows for seamless integration with existing communication devices.

You can use the frequency of Retevis RT21 walkie talkies in America without any license. The RT21 frequency range is FRS: 462-467MHz, so RT21 is license-free walkie talkie. Hope this can help you. In addition, we provide 2 year warranty and 30 days no reason to return; 2 year warranty for radio body and 2 month warranty for accessories. If any question, just feel free to contact us by Amazon email, we are glad to help you.

The FCC test report for 2AAR8RETEVISRT21 says output is 29.9 dBm = 0.977 Watts. 33 dBm (2.0 Watts) is max under 2017 rules for FRS.

We have the Bluetooth Handheld Speaker Mic for Retevis RT21 Two Way Radios, here is the link: https://www.amazon.com/gp/product/B08XBXPFNR/ref=ask_ql_qh_dp_hza. And we also have other radios that have Bluetooth function, such as RB37 Bluetooth Walkie Talkie, here is the link: https://www.amazon.com/dp/B08PZ7Y245 and RA19 Bluetooth Walkie Talkies, here is the link: https://www.amazon.com/dp/B092S2LDTZ. If you have any other questions, please contact us via Amazon message, we are always here to help you.

Dear customer, Thank you very much for your inquiry. Because the battery is low, so it reminds you to change the battery. There are two ways to charge RT21 walkie talkies, you can charge the RT21 walkie talkies or the battery alone in the charging base. Hope these can help you, if you still have any questions, please feel free to contact us via Amazon mail, we are always here for you. Best regards, Angela