Core Feature Highlights Licence-free legal use, 409MHz public frequency band No need to apply for band licence, ready to use, covering family, outdoor, commercial and other scenarios, to meet the needs of parent-child activities, team travel, hotel security and other needs. 20 channels to choose from, support channel scanning and listening, avoid signal interference, ensure clear and stable communication. Ultra-long battery life and portable design 16 hours long standby time (5% transmit, 5% receive, 90% standby), equipped with 1200mAh battery, support AAA alkaline battery (need to purchase) emergency replacement, worry-free battery life. Lightweight body: only 140g, dimensions 130 x 48 x 27mm, with clip and loop, can be easily clipped to a backpack, belt or pocket, no burden to carry. Applicable Scenarios and Crowds Family and children activities: when playing in the park, beach holiday, parents and children real-time communication, to ensure safety. Outdoor adventure team: when hiking, camping, trekking, members of the rapid coordination, to avoid getting separated. Small and medium-sized commercial scenarios: hotels, restaurants, construction sites, security team internal communication, improve efficiency. Emergency communication reserve: natural disasters, power outages and other emergencies, as a backup communication tool.