--- product_id: 84164996 title: "DIYmall HJ Digital RC Servo Tester" brand: "diymall" price: "$26.28" currency: USD in_stock: true reviews_count: 13 category: "Di Ymall" url: https://www.desertcart.us/products/84164996-diymall-hj-digital-rc-servo-tester store_origin: US region: United States of America --- # Precise servo position & PWM display Up to 250Hz digital PWM frequency 4-channel simultaneous servo control DIYmall HJ Digital RC Servo Tester **Brand:** diymall **Price:** $26.28 **Availability:** ✅ In Stock ## Summary > 🎮 Elevate your RC game with precision testing that keeps you ahead of the pack! ## Quick Answers - **What is this?** DIYmall HJ Digital RC Servo Tester by diymall - **How much does it cost?** $26.28 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/84164996-diymall-hj-digital-rc-servo-tester) ## Best For - diymall enthusiasts ## Why This Product - Trusted diymall brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Portable:** Small, lightweight design fits perfectly in your toolkit or drawer—ready whenever you are. - • **Multi-Servo Mastery:** Control and test up to 4 servos simultaneously for ultimate RC precision. - • **Versatile Testing Modes:** Switch effortlessly between manual, center, and repetitive servo movement modes to fine-tune every setting. - • **Real-Time Digital Readout:** Instantly view servo position and PWM values on a clear digital display—no guesswork. - • **High-Frequency Pulse Power:** Supports digital PWM signals up to 250Hz for ultra-responsive servo performance. ## Overview The HJ Digital RC Servo Tester is a compact, multi-channel device designed for precise control and testing of up to 4 servos simultaneously. Featuring high-frequency PWM support up to 250Hz and a clear digital display, it enables real-time monitoring and fine-tuning of servo positions and speed controllers. Ideal for RC helicopters, airplanes, and cars, it offers versatile modes including manual, center, and repetitive movements, making it an essential tool for professional-grade remote control setup and maintenance. ## Description Buy DIYmall HJ Digital RC Servo Tester ESC Consistency Tester Speed Controller | for RC Helicopter Airplane Car Motor, Throttle Display: Electric Speed Controllers - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Excellent Servo Speed Controller Tester/Bench Controller - Excellent tool, so useful it's amazing! It saves so much tint because you can find/set/,determine the position, travel, range of a servo including the PWM (Pulse width modulation) the PWM is how flight controllers etc... speak to the servos/ speed controller (you can do your initial setup of a speed controller even if it doesn't have a bt_heli interface). This allows you to see the pulse per second and even play a loop if you choose through the range, or center or just wherever you choose and the display makes it 100 times better than others! Review: Simple Multi-Mode Servo adjuster and Tester. - I was looking hard for a simple solution to adjust servos with a digital read out. The digital read out at a good price was key. This tool works well. Make sure you put Signal pin up..! I use a LiFe 2S battery and the unit itself is small and easy to store in a drawer. This was and is a good fit for me as it replaced my aging HiTec 25 that is over a decade old and over sensitive to adjust. Modes on Select switch are "Manual, Center 1500 and end to end repetitive movement.". So far it has been great to use on my bench. ## Features - 1 X HJ Digital Servo Tester / ESC Consistency Tester - 4CH tester servo: It can control 4 servos at the same time - 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 ## Product Details - **Brand:** DIYmall - **Color:** Blue + black - **Item Weight:** 0.03 kg - **Power Source:** Battery Powered - **Style:** Digital Servo Tester ## Images ![DIYmall HJ Digital RC Servo Tester - Image 1](https://m.media-amazon.com/images/I/511HMIAVo2L.jpg) ## Questions & Answers **Q: What mode is set on power up? I need the mode to be set to "Automatic sweep" when powered on. Thanks!** A: It can not set"Automatic sweep" when powered on. **Q: When set to automatic, can you adjust the speed at which it cycles back and forth?** A: No, you can not, if it is in auto mode, the sensor will remove automatically ## Customer Reviews ### ⭐⭐⭐⭐⭐ Excellent Servo Speed Controller Tester/Bench Controller *by M***. on September 7, 2025* Excellent tool, so useful it's amazing! It saves so much tint because you can find/set/,determine the position, travel, range of a servo including the PWM (Pulse width modulation) the PWM is how flight controllers etc... speak to the servos/ speed controller (you can do your initial setup of a speed controller even if it doesn't have a bt_heli interface). This allows you to see the pulse per second and even play a loop if you choose through the range, or center or just wherever you choose and the display makes it 100 times better than others! ### ⭐⭐⭐⭐⭐ Simple Multi-Mode Servo adjuster and Tester. *by J***D on June 12, 2025* I was looking hard for a simple solution to adjust servos with a digital read out. The digital read out at a good price was key. This tool works well. Make sure you put Signal pin up..! I use a LiFe 2S battery and the unit itself is small and easy to store in a drawer. This was and is a good fit for me as it replaced my aging HiTec 25 that is over a decade old and over sensitive to adjust. Modes on Select switch are "Manual, Center 1500 and end to end repetitive movement.". So far it has been great to use on my bench. ### ⭐⭐⭐⭐⭐ Good *by W***. on February 27, 2026* Excellent product --- ## 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.us/products/84164996-diymall-hj-digital-rc-servo-tester](https://www.desertcart.us/products/84164996-diymall-hj-digital-rc-servo-tester) --- *Product available on Desertcart United States of America* *Store origin: US* *Last updated: 2026-09-11*