Send T400 VTX

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Push your micro drone further with the Sub250 Send T400 VTX. Purpose-built for sub-250g FPV drones, this ultra-lightweight analog video transmitter delivers up to 400mW of output power while weighing a mere 2 grams. It is the perfect upgrade for toothpick frames, Tiny Whoops, and lightweight cruisers that need a reliable, long-range video feed without the bulk.

Smart Thermal Protection

High power in a small package usually means excess heat, but Sub250 has you covered. The Send T400 features an integrated temperature control system that automatically manages heat output to prevent the VTX from overheating and burning out during prolonged flights or pre-flight setups.

Easy Tuning & OSD Control

Changing your video channel in the field has never been easier. The T400 fully supports the IRC Tramp protocol, allowing you to change your frequency band, channel, and power output directly through your FPV goggles using the Betaflight OSD. Alternatively, you can use the onboard physical buttons to cycle through settings, with 7 bright LEDs clearly displaying your current frequency and power status.

Compact & Compatible

Designed to integrate seamlessly into modern micro builds, the T400 utilizes a standard 25.5×25.5mm (M2) whoop-style mounting pattern. It connects to your flight controller via an easy-to-use SH1.0 plug (no micro-soldering required!) and features a standard U.FL antenna connector for maximum compatibility with aftermarket FPV antennas.

Key Features:

• High Output: Adjustable power levels (PitMode / 25mW / 200mW / 400mW) for any flying environment.

• Ultra-Lightweight: Adds virtually no weight to your build at just 2g.

• Smart Cooling: Built-in thermal protection system prevents overheating.

• Remote Control: Full Betaflight OSD control via IRC Tramp.

• Plug and Play: SH1.0 cable connection and standard 25.5mm mounting.

Specifications:

• Brand: Sub250

• Model: Send T400

• Input Voltage: 5V

• Output Power: PitMode / 25mW / 200mW / 400mW

• Channels: 48CH

• Protocol: IRC Tramp

• Antenna Connector: U.FL

• Cable Connector: SH1.0 4-Pin

• Microphone: None

• Mounting Pattern: 25.5mm x 25.5mm (M2)

• Input Impedance: 75Ω

• Weight: 2g

What’s in the Box?

• 1x Sub250 Send T400 VTX

• 1x SH1.0 4-Pin Cable

• 1x 5.8GHz Linear Antenna (50mm / U.FL)