If you needs the two way radio easy to operate and also last long time,the RT21 is your perfect choice;

Because the radio have been set to the same frequency and they can work with each other when out of the box.
It also have the stubborn accessories, and you also easy to found the suitable accessories.
Dust-proof and anti-broken suit for the outdoor work,and also work well for the team work.

Built-in Private code: The Private code feature provides enhanced security for your important public safety and private security communications. Suitable for hotels, restaurants, construction sites, factories, etc.

Features: 
Single band
Single frequency
Frequency UHF
Memory Channel: 16
CTCSS/DCS function
Low battery alarm
Scanning
Busy Channel Lock Out
Power:2.5W
Emergency Alarm
Wide/Narrow Bandwidth Selection (25 KHZ/12.5KHz)
VOX Function
Battery Save Function
English/Chinese Voice Prompt
High/ Low Power Select-able

Package Details
4 x Retevis RT21 Portable Radio
4 x 3000mAh Li-ion battery
4 x Antenna
4 x Charger
4 x Belt Clip
4 x Sling
2 x English User manual
4 x Earpieces

Product Features

• Two way radios with 3000mAh battery capacity will last 36 hours using and support 120 hours long standby
• Event walkie talkies with earpiece and built-in 1-8 private code can keep your private communication and enhance your communication safety
• Long range and crystal voice radios walkie talkies suitable for various events;Durable radio body and accessories help you save a lot
• FRS frequency Radios could use directly when out of the box and easy to operate for adults and kids
• Good reception and crystal transmission sound; Strong penetration and audio keep you and your team always stay in contact with loud clarity sound quality in building or outdoor