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A28 10W Portable Radio 2500mAh Battery Makes Communication Faster.

The A28 is designed as powerful long-distance handheld walkie-talkie, professional high output power, sturdy and resistant to falling, designed for harsh working environments.

— Highlights —

	Voice Prompt			Type-C Charging Interface
	The radio actually talks to you in a human-like voice. You will hear the prompt spoken in plain relative language.			The Type-C charging interface is so simple usage by specifying cables having identical plugs on both ends, which can be inserted without concern about orientation.
	Dual PTT			Scan
	You can monitor two channels at one time. If you have two groups of people you contact regularly this can be a very useful feature.			The channel scan feature enables a two way radio to continuously scan each channel for activity.
	Hands-free VOX			Power Adjustable
	This hands-free feature allows you to get on with other manual tasks while you stay in touch with other users.			This feature allows you to switch between high and low power modes on the radio.
	Wide/Narrow Band			Battery Saver
	Narrowband takes up less frequency space and lowers the chance for interference, wideband channels can carry more infos but require more power.			The radio will switch to automatically after being left unused for a certain amount of time, lessens the drain on your battery and makes it last longer.
	Busy Channel Lockout			Time-out Timer
	This feature keeps communication lines open by preventing radios from listening or transmitting through conversations outside their talkgroup.			This feature will stop the transmission of the two-way radio if the radio is transmitting for a long duration.
	Compandor			Scrambler
	This feature can help improve signal-to-noise ratio, reduce the background noise and obtain good audio quality at the receiver.			A technology is used to scramble communications to prevent other radio users in the vicinity from listening to your conversations.
	Easy Pairing			Wireless Cloning
	This radio has a fast frequency measurement and decoding function, easy to talk with other radios.			Wireless cloning allows you to easily copy radio settings from one radio (the master) to all other radios within range without the use of wires or cables.
	Roger Beep/Talk Confirmation Tone			Low Battery Alert
	When this feature is activated, a tone is transmitted to the listener after a transmission.			This warning reminds that your battery is low and must be either recharged or replaced.
	CTCSS/DCS			1750Hz
	CTCSS uses continuous tones below 300 Hz whereas DCS uses digital data and all encoded words can be used on the same channel without interference.			1750Hz is used to connect to the repeater.

— Specifications —

General
Frequency Range	400-470 MHz
Channel Capacity	16
Zone Capacity	/
Channel Spacing	12.5/25kHz
Frequency Stability	±500Hz
Antenna Impedance	50Ω
Operating Voltage	DC 7.4V
Battery Capacity	2500mAh
Battery Life(5-5-90 Duty Cycle,High TX Power)	15 hours
Dimensions (ex ant, H×W×D)	156x58x38 mm
Weight	About 257g
Transmitter
Output Power	10W/5W
Analog FM Modulation	16KФF3E
Digital 4FSK Modulation	/
Conducted/Radiated Emission	< -30dBm [ < 1 GHz]; < -25dBm [ > 1 GHz ]
Modulation Limiting	±2.5kHz @12.5 kHz ±5kHz @ 25kHz
FM Hum & Noise	<-40 dB
Adjacent Channel Power	≤-65 dB
Audio Response	＋1dB～－3dB
Modulation Distortion	≤5%
Digital Vocoder Type	/
Digital Protocol	/
Carrier Frequency Tolerance	±500Hz
Receiver
Sensitivity(Analog)	≤0.2μV@12dB SINAD
Selectivity(Digital)	/
Adjacent Channel Selectivity	≥60dB
Inter Modulation Response Rejection	≥60dB
CSQ Hum & Noise	<-40 dB
Rated Audio Power Output	≤1000mW
Rated Audio Distortion	≤5%
Conducted Spurious Emission	< -57 dBm [ < 1 GHz ] ; < -47 dBm [ > 1 GHz ]
Co-channel Rejection	≥-8dB
Block	≥84dB
Received Signal To Noise Ratio	<-40 dB
NOTE: 1.All specifications are subject to change without notice due to continuous development.