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General Features:

1. Gemini‑X True Diversity dual RF system: Stable link performance under complex radio‑frequency environment for safer flight

2. ExpressLRS 2.4GHz compatible: Works with all ExpressLRS transmitters and RF modules

3. Max 100mW telemetry power: Adjustable via LUA script for improved telemetry range

4. CRSF & SBUS output: Supports flight controller and external decoder connection

5. Practical hardware features: 25cm replaceable MMCX antenna; Wi‑Fi firmware update via WebUI; DC 5‑12V input, up to 70V voltage sensing for large fixed‑wing

Difference Features:
ER3 PRO:

1. Ultra-light 3CH PWM satellite receiver (13.5g), ideal for large fixed-wing setups using an external decoder board.

2. Built for dual-RX redundancy backup, pairs with a second receiver for fail-safe redundancy.

3. Locking external UART connector,secure hookup for telemetry sensors & system expansion.

4. Independent dual-voltage telemetry, monitor RX voltage (≤12V) and Ext-V (≤70V) on separate ADC channels.

ER12:

1. 12CH full PWM output + dedicated bidirectional UART,complete channel coverage for big airframes.

2. Dedicated XT30 power input, stable high-current feed for high-power servo systems.

3. PWM signal amplifier,stronger, cleaner signal over long servo leads & extensions common in large models.

4. Triple independent voltage telemetry, RX / Ext-V / XT30 input monitored separately.

ER16:

1. 16CH full PWM output + bidirectional UART: Max channel capacity for complex model setups.

2. Dual isolated XT30 redundant power inputs: Auto‑switch to backup power if one source fails for uninterrupted flight.

3. External safety switch port(SW): Powers on only when armed for safer transport and ground setup.

4. PWM signal amplifier: Ensures stable signal with long servo extension leads.

Description:

RadioMaster ER3 PRO, ER12 and ER16 are Gemini‑X diversity ELRS PWM receivers for large fixed‑wings, providing 3/12/16 PWM channels respectively; ER3‑PRO for satellite redundancy, ER12 with XT30 power input, ER16 features dual XT30 redundant power and safety switch.

Specifications:

ER3 PRO

Channels: 3CH PWM

Power Input: DC 5‑12V

Weight: 13.5g (w/o antenna)

Highlight: Gemini‑X diversity, satellite redundant receiver setup

ER12

Channels: 12CH PWM

Power Input: DC 5‑12V, XT30 power input

Weight: 22.5g (w/o antenna)

Highlight: PWM signal amplifier for long servo leads

ER16

Channels: 16CH PWM

Power Input: DC 5‑12V, dual isolated XT30 redundant power

Weight: 33.0g (w/o antenna)

Highlight: PWM signal amplifier, external safety switch port

Package contents:
ER3 PRO

1 × ER3 PRO Gemini‑X ELRS PWM Receiver

2 × 2.4GHz Antenna

2 × Dual Band Antenna

1 × Type‑B Voltage Telemetry Cable

1 × CRSF Cable

1 × ELRS‑RX‑SBUS Cable

ER12

1 × ER12 Gemini‑X ELRS PWM Receiver

2 × 2.4GHz Antenna

2 × Dual Band Antenna

1 × Type‑B Voltage Telemetry Cable

1 × CRSF Cable

1 × ELRS‑RX‑SBUS Cable

ER16

1 × ER16 Gemini‑X ELRS PWM Receiver

2 × 2.4GHz Antenna

2 × Dual Band Antenna

1 × Safety Switch Module

1 × Type‑B Voltage Telemetry Cable

1 × CRSF Cable

1 × ELRS‑RX‑SBUS Cable

ER16 CNC Safety Switch Replacement Module

1 × "Remove Before Flight" Warning Lanyard

1 × Brass Safety Lock Plug

1 × Two‑piece Metal Mounting Panel

1 × 300mm Servo Connector Cable

Note:

Only the above package content, other products are not included.

1.Due to the difference between different monitors,the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.

2.Due to the manual measurement and different measurement methods, please allow 1-3mm deviation.Thanks!

Before purchase:

1.All the goods are ready stock, we will arrange the shipment at once if we receive the order.

2.Please read the item description, if you have any question, do not hesitate to contact us.

3.No warranty,if you receive a defect item,please contact us at once with item picture.

4.Use the vouchers for more saving.

After purchase:

1.If you are satisfied,please express your use feeling.

2.Please contact us before you are going to give us bad review. We are helpful and will solve the problems. If you receive a defect item,please contact us at once with item picture or video.