--- product_id: 14791949 title: "GoolRC HJ Digital Servo Tester/ESC Consistency Tester for RC Helicopter Airplane Car" brand: "goolrc" price: "โ‚ฌ 30.52" currency: EUR in_stock: true category: "Gool Rc" url: https://www.desertcart.fr/products/14791949-goolrc-hj-digital-servo-tester-esc-consistency-tester-for-rc store_origin: FR region: France --- # 250Hz digital signal frequency Pulse width adjustable 800-2200ยตs 4 servo synchronized output GoolRC HJ Digital Servo Tester/ESC Consistency Tester for RC Helicopter Airplane Car **Brand:** goolrc **Price:** โ‚ฌ 30.52 **Availability:** โœ… In Stock ## Summary > ๐Ÿš€ Elevate your RC game with pinpoint servo precision! ## Quick Answers - **What is this?** GoolRC HJ Digital Servo Tester/ESC Consistency Tester for RC Helicopter Airplane Car by goolrc - **How much does it cost?** โ‚ฌ 30.52 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/14791949-goolrc-hj-digital-servo-tester-esc-consistency-tester-for-rc) ## Best For - goolrc enthusiasts ## Why This Product - Trusted goolrc brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - โ€ข **Multi-Mode Testing:** Switch effortlessly between manual, neutral, and automatic modes to simulate real-world servo conditions. - โ€ข **Real-Time PPM Sync:** Instantly monitor and synchronize PPM signals for dynamic, on-the-fly diagnostics. - โ€ข **Compact & Lightweight:** Take professional-grade testing anywhere with a sleek 39g tester that fits in your toolkit. - โ€ข **Precision Pulse Control:** Fine-tune servo response with ultra-accurate 2ยตs signal adjustments for flawless RC performance. - โ€ข **Universal Compatibility:** Seamlessly test servos and ESCs across helicopters, airplanes, and cars with a single compact device. ## Overview The GoolRC HJ Digital Servo Tester/ESC Consistency Tester is a compact, battery-powered device designed for RC enthusiasts to accurately test and calibrate servos and ESCs. Featuring adjustable pulse widths from 800 to 2200 microseconds and multiple signal frequencies up to 250Hz, it supports synchronized output for up to 4 servos. Compatible with helicopters, airplanes, and cars, it offers manual, neutral, and automatic modes alongside real-time PPM signal synchronization, making it an essential tool for professional-grade RC performance tuning. ## Description Descriptions: 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. 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: 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 Specifications: Brand: HJ 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 Package list: 1 * HJ Digital Servo Tester / ESC Consistency Tester ## Features - 100% brand new - 1 * HJ Digital Servo Tester / ESC Consistency Tester - 250H Digital Servo signal cycle 4us frequency 250Hz - 50H analog servo signal cycle 20us frequency 50Hz - Search EverTrust for more choices! ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00LTOD4F4 | | Best Sellers Rank | #489,723 in Toys & Games ( See Top 100 in Toys & Games ) #1,064 in RC Servos | | Brand Name | GoolRC | | Color | Black/Blue | | Compatible Devices | RC Helicopter, Airplane, Car | | Customer Reviews | 4.3 4.3 out of 5 stars (163) | | Item Dimensions | 5.51 x 3.94 x 1.18 inches | | Item Weight | 9.07 g | | Manufacturer | EverTrust | | Measurement Type | Pulse Width (ยตs) | | Minimum Operating Voltage | 5 volts_of_direct_current | | Model | E-1977664138 | | Number of Items | 1 | | Number of Packs | 1 | | Part Number | GMEPN-IT-72814767 | | Power Source | Battery Powered | | Style Name | Compact | | UPC | 713524494858 796389726333 519752101342 | | Unit Count | 1 Count | ## Product Details - **Brand:** GoolRC - **Color:** Black/Blue - **Item Weight:** 9.07 g - **Power Source:** Battery Powered - **Style:** Compact ## Images ![GoolRC HJ Digital Servo Tester/ESC Consistency Tester for RC Helicopter Airplane Car - Image 1](https://m.media-amazon.com/images/I/519DGU1Q1wL.jpg) --- ## Why Shop on Desertcart? - ๐Ÿ›’ **Trusted by 1.3+ Million Shoppers** โ€” Serving international shoppers since 2016 - ๐ŸŒ **Shop Globally** โ€” Access 737+ million products across 21 categories - ๐Ÿ’ฐ **No Hidden Fees** โ€” All customs, duties, and taxes included in the price - ๐Ÿ”„ **15-Day Free Returns** โ€” Hassle-free returns (30 days for PRO members) - ๐Ÿ”’ **Secure Payments** โ€” Trusted payment options with buyer protection - โญ **TrustPilot Rated 4.5/5** โ€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.fr/products/14791949-goolrc-hj-digital-servo-tester-esc-consistency-tester-for-rc](https://www.desertcart.fr/products/14791949-goolrc-hj-digital-servo-tester-esc-consistency-tester-for-rc) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-09-29*