--- product_id: 101847117 title: "HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display" brand: "stemedu" price: "€ 26.25" currency: EUR in_stock: true category: "Stemedu" url: https://www.desertcart.at/products/101847117-hj-digital-servo-tester-esc-consistency-speed-controller-for-rc store_origin: AT region: Austria --- # 2µs signal accuracy 4 servos simultaneous control 360° continuous rotation HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display **Brand:** stemedu **Price:** € 26.25 **Availability:** ✅ In Stock ## Summary > 🎮 Unlock pro-level servo testing with precision and speed! ## Quick Answers - **What is this?** HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display by stemedu - **How much does it cost?** € 26.25 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/101847117-hj-digital-servo-tester-esc-consistency-speed-controller-for-rc) ## Best For - stemedu enthusiasts ## Why This Product - Trusted stemedu brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Multi-Servo Mastery:** Simultaneously test and control up to 4 servos, streamlining your workflow. - • **Precision Pulse Control:** Achieve ultra-precise 2 microsecond signal accuracy for flawless servo response. - • **Compact & Durable Design:** Lightweight, portable blue-black casing built for on-the-go pros and lab environments. - • **Versatile Frequency Modes:** Switch effortlessly between 50Hz analog, 125Hz & 250Hz digital signal cycles for ultimate compatibility. - • **Real-Time PPM Signal Display:** Monitor input PPM signals live on-screen to catch subtle servo performance shifts instantly. ## Overview The Stemedu FT90R Mini Digital Servo Tester is a compact, battery-powered device designed for professional-grade servo diagnostics. It supports simultaneous control of 4 servos with ultra-precise 2µs signal accuracy and offers multiple frequency modes (50Hz analog, 125Hz & 250Hz digital) to ensure broad compatibility. Featuring a real-time PPM signal display and a durable, portable design, it’s ideal for robotics, RC vehicles, and drone motor testing—saving time and boosting reliability. ## Description desertcart.com: Stemedu HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display : Toys & Games ## Features - ▶ This 4CH servo tester can control 4 servos at the same time, output signal can be accurate to 2us (1 milliseconds = 1000 microseconds) - ▶ 50H analog servo signal cycle 20us frequency 50Hz - ▶ 125H digital the steering gear a signal cycle 8us frequency 125Hz - ▶ 250H Digital Servo signal cycle 4us frequency 250Hz - ▶ You will get 1 x RC Digital Servo Tester/ESC Consistency Tester ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B07JCZKGH9 | | Best Sellers Rank | #319,767 in Toys & Games ( See Top 100 in Toys & Games ) #601 in RC Servos | | Brand | Stemedu | | Brand Name | Stemedu | | Color | Blue | | Compatible Devices | RC Helicopter, RC Airplane, RC Car | | Customer Reviews | 4.5 out of 5 stars 74 Reviews | | Manufacturer | Stemedu | | Measurement Type | LCR Meter | | Min. Operating Voltage | 4.8 volts | | Minimum Operating Voltage | 4.8 volts | | Model | ST0080-ST0080X2 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | ST0080-ST0080X2 | | Power Source | Battery Powered | | Style | servo tester(1PCS) | | Style Name | servo tester(1PCS) | | Unit Count | 1 Count | ## Product Details - **Brand:** Stemedu - **Voltage:** 6 Volts - **Material:** Plastic - **Item Weight:** 9 Grams - **Manufacturer:** Stemedu ## Images ![HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display - Image 1](https://m.media-amazon.com/images/I/51xy9wF-0DL.jpg) ![HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display - Image 2](https://m.media-amazon.com/images/I/71tfEVoxeQL.jpg) ![HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display - Image 3](https://m.media-amazon.com/images/I/41TNelEi1hL.jpg) ![HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display - Image 4](https://m.media-amazon.com/images/I/51siuQ4TroL.jpg) ![HJ Digital Servo Tester ESC Consistency Speed Controller for RC Helicopter Airplane Car Motor Throttle Display - Image 5](https://m.media-amazon.com/images/I/51VCkiIiYhL.jpg) ## Available Options This product comes in different **Style** options. ## Frequently Bought Together - Stemedu 4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Continuous Rotation RC Micro Servo for Helicopter Car Boat - Miuzei MG90S 9G Micro Servo Motor Metal Geared Motor Kit for RC Car Robot Helicopter, Mini Servos for Arduino Project (10) - 30A RC Brushless Motor Electric Speed Controller ESC 3A UBEC with XT60 & 3.5mm Bullet Plugs --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.at/products/101847117-hj-digital-servo-tester-esc-consistency-speed-controller-for-rc](https://www.desertcart.at/products/101847117-hj-digital-servo-tester-esc-consistency-speed-controller-for-rc) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-10-12*