Retevis RT21 is the enhanced version of the H-777 and RT7
RT21 have the big body than the H-777,RT7,so that take it outside and no worry about the fall apart.
RT21 have the high-gain antenna,not need to order the replacement because worry it will fell apart.
RT21 have the solid shell and belt,not worry the belt broken so that walkie talkie falls.
RT21 have the superior cell and keep great transmission for a long time using.
The scrambler feature provides enhanced security for your important public safety and private security communications. Suitable for hotels, restaurants, construction sites, factories, etc.
Battery power:1300 mAh
Frequency Range: UHF 400-480MHz
Memory Channel: 16
Low battery alarm
Busy Channel Lock Out
Wide/Narrow Bandwidth Selection (25 KHZ/12.5KHz)
Battery Save Function
English/Chinese Voice Prompt
High/ Low Power Selectable
10 x Retevis RT21 portable Radio
10 x Li-ion battery
10 x Antenna
10 x Charger
10 x Hard Belt Clip
10 x Hand strap
10 x Air Acoustic Earpiece
2 x English user manual
Note:If you have the H-777 walkie talkie, you also want to order another great radio to work with the H-777,please buy RT21 with confidence,they have the same frequency out of the box..