Kirisun PT558S Walkie-Talkie UHF VHF Dual Band Habdheld Radio Kirisun PT4200 Upgrade

Main features

DSP Audio & CTCSS/DCS

Digital noise blanking plus 38 analog and 83 digital sub-tones eliminate co-channel interference from nearby Wi-Fi or LED drivers.

16-Channel Rotary Selector

Segment by floor, shift, or department; clone via wired cable in under 30 seconds per unit.

Voice-Number Reporting

Audible channel and battery announcements—perfect for gloved staff or dark warehouse aisles.

Long lasting battery life

Auto power-save and time-limited TX stretch the 1500 mAh pack to 12-hour shifts, cutting battery churn.

Dual Side-Keys + Front PTT

Programmable for monitor, scan, or alarm—large enough for construction gloves.

Compact 120 g Design

Fits shirt pockets and belt clips without snagging on pallet jacks or supermarket cages.

IP54 Housing & Drop-Tested

Survives 1.2 m drops and dust ingress, validated on loading docks and outdoor festivals.

Other functions

Specification	Value
Model	PT558S
Frequency Range	136–174 MHz; 400–470 MHz
Channels	16
Channel Spacing	25 kHz (Wide) / 12.5 kHz (Narrow)
Operating Temperature	-25°C to +55°C
Antenna Impedance	50 Ω
Battery (Standard)	Li-Ion 1000 mAh, 7.4 V
Dimensions	102 × 56.5 × 29.5 mm
Weight	235 g (with battery & antenna)
Receive Sensitivity (12 dB SINAD)	≤ 0.2 μV
Adjacent Channel Selectivity	≥ 60 dB @ 12.5 kHz; ≥ 70 dB @ 25 kHz
Intermodulation Attenuation	≥ 60 dB
Audio Output Power	1 W
Transmit Power (High/Low)	4 W / 1 W
Transmit Spurious Emission	-36 dBm < 1 GHz; -30 dBm > 1 GHz
Remaining Deviation	≥ 40 dB @ 25 kHz; ≥ 35 dB @ 12.5 kHz
Audio Distortion	< 5 %
Frequency Stability	2.5 ppm
Modulation Limitation	±2.5 kHz @ 12.5 kHz; ±5 kHz @ 25 kHz