All-in-one Walkie Talkie Module Kit SA828 UHF FM Transceiver Small Volume Embedded Wireless Interphone Module

Feature Full frequency band 400 480 MHZ 134 174MHZTransmit receive frequency independentBandwidth 12 5 25 KHzOutput power up to 1WOpen distance is 4 5 kmHigh receiving sensitivity 124dBmHighly integrated small volume38 level CTCSS analog sub audio code available with PC software and serial port 166 level CDCSS digital sub audio PC software and serial port can be set 8 level squelchVolume external potentiometer adjustmentHigh and low power options 500mW lW Wide range of operating voltage 3 3 5 5VBuilt in EEPROM data power down saveStable with 1 5ppm TCXO crystalApplications Small walkie talkieIgnore the intercom systemBuilding community security systemOutdoor sports productsAudio monitoring systemParameterTest ConditionsMIN TypicalMAX UnitOperating voltage range 3 34 25 5VOperating temperature range 302570°CCurrent consumptionSleep current3 uAReceiving current60 mAEmission current high power 650750mAEmission current low power 450550mATransmitting RF parameterOperating frequency range 400 480MHZTransmit power high power VCC 4 0V2829 531dBmTransmit power low power 2526 527dBmModulation sensitivity®1 5Khz 2 5KHZ Frequency offset 10 mVAudio modulation distortion®1 5Khz 2 5KHZ Frequency offset 25 Signal to noise ratio®1 5Khz 2 5KHZ Frequency offset384045dBAdjacent channel power 12 5K offset 60dBc dBmCTCSS modulation frequency offset 0 350 50 75KHzReceiving RF parameterReceiving sensitivity13dB output voice signal ratio 124 dBmReceive signal to noise rat