Ruibotong Trading Co., Ltd. is a professional manufacturer of wireless communication accessories located in Guangzhou, Guangdong Province, China for 25 years. The factory integrates R&D, production and sales of two-way radio program lines, receivers, receivers, speaker microphones, battery borrowers, chargers, antennas and other products. And cooperate with a number of brand agents, Hytera, Motorola, icom, Kenwood, Baofeng and other walkie-talkie sales channels, we adhere to the "quality first" production concept, committed to providing customers with stable and reliable product quality. It is highly praised by customers at home and abroad, and has received strong support and recognition from customers. We will continue to join hands with our customers to create a more brilliant future. Quality Control Perfect and mature quality management system, from raw materials, semi-finished products to finished products, have undergone strict testing and inspection, and strive to provide customers with high-quality products. Company philosophy "Quality first" business philosophy, to provide our customers with stable and reliable products.
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Technical Analysis and Product Comparison
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1. Key Factors
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Transmit Power
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Civilian devices (0.5W-5W):
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Urban areas: 1-3 km.
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Open terrain: 3-8 km.
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Professional/commercial devices (5W-50W):
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Open terrain: 10-20 km (extendable with repeaters).
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Note: High-power devices may require licenses under local radio regulations.
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Frequency Band
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UHF (400-470 MHz): Better penetration for cities/buildings, shorter range (1-5 km).
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VHF (136-174 MHz): Better diffraction for rural/open areas, longer range (3-10 km).
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Terrain & Environment
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Open areas (plains, sea): 5-10+ km (unobstructed).
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Urban areas: 1-3 km (blocked by buildings).
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Mountains/forests: Reduced to hundreds of meters.
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Antenna Performance
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Height and gain significantly affect range. Vehicle-mounted or high-gain antennas boost distance.
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Raising handheld devices (e.g., on a hilltop) can double the range.
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Weather & Interference
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Extreme weather (rain, fog) has minor impact. Major interference comes from electromagnetic sources (e.g., power lines, WiFi).
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2. Typical Scenarios
| Scenario | Handheld (5W) | Vehicle/Repeater |
|---|---|---|
| Urban streets | 1-3 km | 3-5 km (vehicle antenna) |
| Suburbs/rural areas | 3-8 km | 10-15 km |
| Mountains (line-of-sight) | 5-10 km | 15-30 km (with repeaters) |
| Sea/open plains | 10+ km | 50+ km (repeater networks) |
3. Tips to Extend Range
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Choose VHF for open areas and UHF for dense environments.
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Elevate antennas (e.g., mount on rooftops or hills).
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Avoid obstructions like buildings or terrain.
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Use repeaters for professional setups.
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Check device status: Ensure battery life and antenna connections.
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