{"product_id":"radiomaster-er4-2-4ghz-elrs-4ch-pwm-receiver","title":"RadioMaster ER4 2.4GHz ELRS 4CH PWM Receiver with Voltage Telemetry","description":"\u003ch2 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eProduct description\u003c\/span\u003e\u003c\/h2\u003e\n\u003ch3 data-pm-slice=\"1 1 []\"\u003e\u003cspan\u003eRadioMaster ER4 2.4GHz ELRS 4CH PWM Receiver\u003c\/span\u003e\u003c\/h3\u003e\n\u003cp\u003e\u003cspan\u003eThe RadioMaster ER4 is an ultra-lightweight 2.4GHz ExpressLRS (ELRS) PWM receiver designed for RC airplanes, small aircraft, boats, cars and other radio-controlled models. Weighing just 3 grams, it provides four direct PWM outputs in a compact package, making it suitable for lightweight builds where space and weight matter.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eWith automatic voltage telemetry, Wi-Fi firmware updates and WebUI configuration, the ER4 offers convenient setup and useful monitoring features for compatible ExpressLRS radio systems.\u003c\/span\u003e\u003c\/p\u003e\n\u003ch3\u003e\u003cspan\u003eKey Features\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2.4GHz ExpressLRS wireless protocol\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eFour PWM output channels for direct servo connections\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eUltra-lightweight design weighing approximately 3g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e15cm high-sensitivity antenna\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eAutomatic telemetry of receiver supply voltage or external battery voltage\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eWi-Fi firmware updates and WebUI configuration\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCRSF\/SBUS serial output support\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003eCompatible with 2.4GHz ExpressLRS transmitters and modules\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003eTechnical Specifications\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eBrand:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e RadioMaster\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eModel:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ER4\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eFrequency:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 2.4GHz\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eProtocol:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ExpressLRS (ELRS)\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOutput:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 4-channel PWM\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eSerial output:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e CRSF\/SBUS\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eOperating voltage:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e DC 4.5–8.4V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eTelemetry power:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 10mW, as listed in RadioMaster's product specifications\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eExternal battery voltage detection:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e DC 4–35V\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eAntenna:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 15cm high-sensitivity antenna\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eDimensions:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e 30 × 15 × 5mm\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eWeight:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Approximately 3g\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003ePre-installed firmware:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e ExpressLRS 3.3.0, according to the manufacturer's listing\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003ePackage Includes\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul data-spread=\"false\"\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × RadioMaster ER4 2.4GHz ELRS PWM receiver\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e2 × Heat-shrink tubes\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × Type-A voltage telemetry wire\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp\u003e\u003cspan\u003e1 × User card\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003e\u003cspan\u003eCompatibility note:\u003c\/span\u003e\u003c\/strong\u003e\u003cspan\u003e Requires a compatible 2.4GHz ExpressLRS transmitter or external module. Check the transmitter's ELRS firmware and binding configuration before use.\u003c\/span\u003e\u003c\/p\u003e","brand":"Radiomaster","offers":[{"title":"Default Title","offer_id":67875395338328,"sku":null,"price":1543.21,"currency_code":"INR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0722\/5137\/5804\/files\/radiomaster_er4_2_4ghz_elrs_pwm_receiver.webp?v=1792617346","url":"https:\/\/aeromodellingtutor.in\/products\/radiomaster-er4-2-4ghz-elrs-4ch-pwm-receiver","provider":"Aeromodellingtutor","version":"1.0","type":"link"}