QS-S4 Trigger Throttle with NFC – 48V–60V | 6-Pin Julet | VSETT, Zero, Bexly, Apollo

The QS-S4 Compatible Trigger Throttle with NFC security is a versatile, controller-compatible throttle solution used across many popular performance electric scooters.

Featuring a 6-pin male Julet connector and NFC card security, this throttle allows authorised rider access while providing smooth trigger-style throttle control. Voltage is configurable via the controller’s P3 setting, making it suitable for 48V to 60V systems.

This unit is ideal for QS-S4 replacements, upgrades, or custom builds where NFC security and broad compatibility are required.

⚠️ Important: This throttle is protocol-dependent. While physically compatible with many scooters listed below, controller settings and display pairing must be correct.

Key Features

• QS-S4 compatible trigger throttle

• NFC security card system (authorised start)

• Adjustable for 48V–60V systems (P3 controller setting)

• Smooth, progressive trigger response

• 6-Pin Male Julet connector

• Widely used across VSETT, Zero, Bexly, Apollo & more

• Ideal for OEM replacement or upgrades

Specifications

• Product Type: Trigger Throttle with NFC

• Compatibility Type: QS-S4 systems

• Voltage Range: 48V–60V (P3 adjustable)

• Connector: 6-Pin Male Julet

• Security: NFC card authentication

• Throttle Style: Index trigger

• Mounting: Handlebar clamp

• Condition: New

• Colour: Black housing

Compatibility

Compatible with QS-S4-based systems including (but not limited to):

• Bexly: 8, 9, 10, 10X
• Zero Scooters: 8, 8X, 9, 10, 10X
• Grace Series: 8, 9, 10
• Vsett: 8, 8+, 10, 10+
• Apollo: City, Explore, Ghost, Light, Pro
• Kaabo: Mantis Pro
• Varla: Eagle 1
• Bolzzen: Gladiator, Dynamo
• EVOLV Models (Tour 2.0, Tour XL, Pro, and Light)
• Dragon: Raptor, Hunter X10, X9 
• eGlide: MACH 10/10R,
• Carbon Oxy
• T8/T9/T10 DDM and VDM-10 series

⚠️ Always confirm controller and display compatibility before purchase.
Contact EcoMotion if unsure — throttles are not universal, even with the same plug.

Note:

• This product is intended for electric scooters only.
• USB charging capability is not recommended for high-drain devices to avoid damage to the unit.
• Ships with a 6-pin male waterproof connector for easy installation.

How to Access Settings on the QS-S4 Throttle

1. Power on your scooter.
2. Hold the Mode + Power buttons (3-5 seconds) to access the P-setting menu.
3. Use the Mode button to toggle through P-settings.
4. Press the Power button to select the P-setting to adjust.
5. Press Mode button to increase the value, and Power button to decrease the value.
6. To save settings, allow the LCD to timeout (3-5 seconds) or long press Mode + Power buttons to exit the menu.

P-Settings

• P1: LCD Brightness: Set to 3 for brightest. The drain on the battery is minimal.
• P2: Mileage display in Miles or Kilometres
• P3: Voltage: 48(V) - 52(V) - 60(V)
• P4: Dormancy time: The amount of time before the scooter will go to sleep/power off.
• P5: Unused
• P6: Wheel diameter in inches
• P7: # of magnets:
• P8: Power Level (%): Control the amount (%) of power/top speed.
• P9: Zero start: Push/Kick Start or Zero start; Set to 0 for zero start, set to 1 for kick-start.
• P10: unused.
• P11: Electronic Braking level. 1-5.
• P12: Acceleration/Torque: 1 is soft start; 5 is high torque.
• P13 - 14: unused
  
• P15: Controller cutoff voltage
• P16: Zero-ing of the Odometer
• P17: Cruise control: set to 0 for OFF (beginners). Set to 1 for ON (advanced riders only). When Cruise control is switched on, it will automatically start when the rider maintains a constant speed for 5 seconds. Cruise Control is will turn off when the brake or throttle is activated. Cruise control can be dangerous if you are not an experienced rider.
• P18 – P20: unused

QS-S4 Error Codes

When the LCD controller detects an error, you’ll get the triangle and exclamation mark symbol, and it will display the fault code just above the battery life display.