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  3. Tectalk Duo vs RB648

Albrecht Tectalk Duo vs Retevis RB648

What Tectalk Duo does better (3) and where RB648 wins (2) — every spec side by side.

Albrecht Tectalk Duo
Albrecht · 2025Tectalk Duo
9.2Score
3 advantages≈ £100
Higher score
vs
Retevis RB648
Retevis · 2026RB648
9.0Score
2 advantages≈ £80
9.6Range & power2.3
8.0Battery8.7
6.2Ruggedness8.0

Why is Tectalk Duo better than RB648?

  1. Maximum range (claimed)12 km vs 2 km6×
  2. Transmit power1 W vs 0.5 W2×
  3. Channels22 vs 16+38%

Why is RB648 better than Tectalk Duo?

  1. Water protection (IPx)IPx6 vs IPx7+17%
  2. DisplayMonochrome display vs Backlit display
Specifications

Side by side

Retevis RB648Retevis RB648≈ £809.0
Radio & range
Radio standardsPMR446, FreenetPMR446
LicenceLicence-freeLicence-free
Digital mode (DMR / dPMR)NoNo
Frequency ranges149 MHz; 446 MHz; 149.0250 - 149.1125 MHz446 MHz
Transmit power1 W0.5 W
Channels2216
Maximum range (claimed)12 km2 km
Privacy codes (CTCSS / DCS)258—
CTCSS / DCS sub-tonesYes—
Squelchadjustable—
Power & battery
Battery capacity2,000 mAh2,000 mAh
Battery voltage7.2 V3.7 V
Power sourceRechargeable packRechargeable pack
USB-C chargingYesYes
Standby time20 h—
Battery level indicatorYesYes
Design & durability
Weight270 g—
Width134 mm—
Height60 mm—
Depth38 mm—
Protection ratingIP56IP67
Water protection (IPx)IPx6IPx7
Shockproof—Yes
DisplayMonochrome displayBacklit display
Features
VOX (hands-free)YesYes
Channel scanYes—
FlashlightYes—
Emergency / SOS alarmYes—
FM radioYes—
Key lockYesYes
Connectivity
Headset / earpiece jack—Yes
ConnectorsUSB-CUSB-C, Kopfhörer
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