UHF (400–480MHz) is better for indoor and urban use — its shorter wavelengths penetrate walls, concrete, and steel more effectively. VHF (136–174MHz) performs better in wide-open outdoor spaces like farmland, highways, and over water. For most businesses — warehouses, hotels, retail, security, construction sites — UHF is the preferred choice. All Sonice portable radios operate on UHF for maximum versatility.

Real-world range depends on terrain, not just wattage. In urban/indoor environments, expect 0.5–2 km. In open outdoor areas, 2–5 km. On hilltop-to-valley line-of-sight, 10+ km is possible. Advertised “35-mile” claims are lab-tested over open water — real conditions matter more. The single biggest factor is antenna height: standing on higher ground can double or triple your effective range.

Yes — as long as they share the same frequency, channel, CTCSS/DCS code, and mode (analog or digital). You can mix Sonice radios with Motorola, Kenwood, Hytera, or any other brand on the same frequency. However, analog and digital radios cannot talk to each other — they must be in the same mode.

Our radios deliver 12–16 hours of typical use (5% transmit, 5% receive, 90% standby). Heavy transmitting reduces this. The SC-718 with its 2600mAh battery provides up to 16 hours talk time and 30+ hours standby. For cold-weather use, keep spare batteries in an inside pocket — lithium-ion performance drops in freezing temperatures. All batteries maintain 80%+ capacity for 12–18 months under normal use.