




Built-in 2200mAh battery
The working time is up to 15 hours; the standby time is 67 hours; the dual-band radio can be used continuously for a long time, and the long-distance intercom can be used all day without worrying about low battery power.





| 
 General  | 
 Frequency Range  | 
 Receive frequency: 136-520MHz  | 
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| 
 Channel Numbers  | 
 999  | 
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| 
 Channel Space  | 
 25 kHz /12.5kHz/20 kHz  | 
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| 
 Input Voltage  | 
 5V 1A  | 
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| 
 Battery Capacity  | 
 2200mAh  | 
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| 
 Current  | 
 Standby  | 
 ≤85mA  | 
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| 
 Receiving  | 
 ≤350mA  | 
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| 
 Transmit  | 
 ≤1.8A @high power, 650 mA @ low power;  | 
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| 
 Frequency Stability  | 
 ±2.5ppm  | 
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| 
 Operation Temperature  | 
 -10℃ to +40℃  | 
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| 
 Antenna Impedance  | 
 50Ω  | 
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| 
 Transmit  | 
 Transmit Frequency  | 
 VHF: USA 144-148/EU 144-146Mhz, UHF:USA 420-450Mhz/EU 430-440Mhz;  | 
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| 
 RF TX Power  | 
 High/Middle/Low  | 
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 Modulation Mode  | 
 16K0F3E@25KHz, 11K0F3E@12.5KHz  | 
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| 
 Spurious Emission  | 
 -36dBm<1GHz, -30dBm>1GHz  | 
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 Signal Noise Ratio  | 
 45dB@25KHz, 40dB @12.5KHz  | 
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| 
 Audio Distortion  | 
 ≤5%  | 
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 Modulation Limited  | 
 ±5.0 KHz@25 KHz,±2.5 KHz@12.5 KHz  | 
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 Adjacent Channel Power  | 
 70dB @ 25KHz,60dB @ 12.5KHz  | 
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| 
 Audio Response (300-3000Hz)  | 
 +1~3dB  | 
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| 
 Receive  | 
 Receive Frequency  | 
 Full band receive: 136-520Mhz; AM:108-136MHz (only receiving) FM:65-108 MHz  | 
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| 
 Receiver Sensitivity  | 
 0.25μV (12dB SINAD)  | 
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 Adjacent Channel Selectivity  | 
 ≥60dB@25KHz, ≥55dB@12.5KHz  | 
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| 
 Intermodulation Rejection  | 
 ≥60dB@25KHz, ≥55dB@12.5KHz  | 
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 Conducted Spurious Emission  | 
 ≤-57dB@25KHz, ≤-57dB @12.5KHz  | 
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| 
 FM Signal Noise Ratio  | 
 ≥45dB@25KHz, ≥40dB @12.5KHz  | 
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| 
 Audio Output Power  | 
 1W @16ohms  | 
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| 
 Audio Distortion  | 
 ≤5%  | 
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| 
 Audio Response (300-3000Hz)  | 
 +1~-3dB  | 
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I bought the A1 for GPS, and the RT3S also has a walkie-talkie. But for the GPS function that I only use for riding, the price of RT3S is a bit expensive. But the price of A1 is very suitable. I like A1. It is relatively small and easy to fix on my bicycle. I will recommend it to my friends.
If you do not like the product you can return it within 15 days - no questions asked. This excludes bodysuits, swimwear and clearance sale items. We have an easy and hassle free return policy. Please look at our Delivery & Returns section for further information.