--- product_id: 101847117 title: "4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co..." brand: "stemedu" price: "₱1602" currency: PHP in_stock: true reviews_count: 11 category: "Stemedu" url: https://www.desertcart.ph/products/101847117-4-pcs-ft90r-mini-digital-servo-rotates-360-degree-small store_origin: PH region: Philippines --- # 2µs signal accuracy 4 servos simultaneous control 360° continuous rotation 4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... **Brand:** stemedu **Price:** ₱1602 **Availability:** ✅ In Stock ## Summary > 🎮 Unlock pro-level servo testing with precision and speed! ## Quick Answers - **What is this?** 4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... by stemedu - **How much does it cost?** ₱1602 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.ph](https://www.desertcart.ph/products/101847117-4-pcs-ft90r-mini-digital-servo-rotates-360-degree-small) ## 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 Product description Description Stemedu HJ Digital Servo Tester can be synchronized output control 4 servos and used to compare the performance steering gear control of the steering servo output signal can be accurate to 2us (1 milliseconds = 1000 microseconds), you can test the steering gear is able to respond to subtle changes With PPM signal test function in the display, the input PPM signal changes while the input the PPM signal synchronization output to the servo Energized automatically enter manual mode (Manual) 20us 50H analog servo signal cycle, frequency 50Hz, rotary potentiometers to decrease or increase the width of the output pulse. Specifications Material: Plastic Color: Blue + black Input voltage: DC 5~6V Output signal width: 800~2200us Package size: 14 * 10 * 3cm / 5.5 * 3.9 * 1.2in Package weight: 39g / 1.4oz Button the Select (Note: the key switch function, circulation patterns) 1. S-1 manual mode (Manual) 2. S-2-bit mode (Neutral) 3. S-3 automatic mode (Automatic) Keys pulse width Keys pulse width 1. 50H analog servo signal cycle 20us frequency 50Hz 2. 125H digital the steering gear a signal cycle 8us frequency 125Hz 3. 250H Digital Servo signal cycle 4us frequency 250Hz Review: very simple, works great. - Using this to bench test motors common to FIRST robotics compeition, CIM, BAG, 775, etc. Just like an RC controller PWM, 1500pwm is neutral, 2200 high is forward, 800 low is reverse. Very simple. Having the screen is key for actually testing motor outputs in mid ranges. Will definitely buy more of these for the lab, and my own drone motor use. Review: Saved me a lot of time - I purchased this to test multiple servos on a project, and I'm glad I did, because before I reassembled everything, I found that one of the servos was not functioning properly. Saved me a lot of time. ## 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 | #198,902 in Toys & Games ( See Top 100 in Toys & Games ) #307 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 71 Reviews | | Manufacturer | Stemedu | | Measurement Type | LCR Meter | | Min. Operating Voltage | 4.8 Volts | | Minimum Operating Voltage | 4.8 Volts | | Model | ST0080-ST0080X2 | | Part Number | ST0080-ST0080X2 | | Power Source | Battery Powered | | Style | servo tester(1PCS) | | Style Name | servo tester(1PCS) | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Stemedu - **Voltage:** 6 Volts - **Material:** Plastic - **Item Weight:** 9 Grams - **Manufacturer:** Stemedu ## Images ![4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... - Image 1](https://m.media-amazon.com/images/I/51xy9wF-0DL.jpg) ![4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... - Image 2](https://m.media-amazon.com/images/I/71tfEVoxeQL.jpg) ![4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... - Image 3](https://m.media-amazon.com/images/I/41TNelEi1hL.jpg) ![4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... - Image 4](https://m.media-amazon.com/images/I/51siuQ4TroL.jpg) ![4 PCS FT90R Mini Digital Servo - Rotates 360 Degree Small Servos - Co... - Image 5](https://m.media-amazon.com/images/I/51VCkiIiYhL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ very simple, works great. *by S***T on June 17, 2019* Using this to bench test motors common to FIRST robotics compeition, CIM, BAG, 775, etc. Just like an RC controller PWM, 1500pwm is neutral, 2200 high is forward, 800 low is reverse. Very simple. Having the screen is key for actually testing motor outputs in mid ranges. Will definitely buy more of these for the lab, and my own drone motor use. ### ⭐⭐⭐⭐⭐ Saved me a lot of time *by R***N on April 14, 2026* I purchased this to test multiple servos on a project, and I'm glad I did, because before I reassembled everything, I found that one of the servos was not functioning properly. Saved me a lot of time. ### ⭐⭐⭐⭐⭐ Works as it should *by R***E on November 14, 2025* Works as it should ## 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.ph/products/101847117-4-pcs-ft90r-mini-digital-servo-rotates-360-degree-small](https://www.desertcart.ph/products/101847117-4-pcs-ft90r-mini-digital-servo-rotates-360-degree-small) --- *Product available on Desertcart Philippines* *Store origin: PH* *Last updated: 2026-06-24*