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SIAECOSYS SCJ313 is a compact 3.13-inch TFT color speedometer display for electric motorcycles and scooters. 376×960 resolution at 1000 cd/m² brightness — the best daylight-visible SCJ for handlebar installations. Per the QS Motor product page, this speedometer is **built for Fardriver controllers sourced through SIAECOSYS** (with LIN or CAN BUS communication). Although the underlying hardware uses the same SIAECOSYS CAN/LIN protocol family as VOTOL controllers, the OEM only advertises Fardriver compatibility for this model. Very wide operating voltage (DC 12-150V pack-direct). Shows speed, battery SOC (Li-ion or lead-acid), voltage, distance, mode, and fault codes. Background settings include voltage calibration, wheel size/speed adjustment, mile/km switching, and speed limit. IP65 rated, -20°C to +70°C operating range. USB software upgrade. Sits below SCJ3622-A (3.6" round) and SCJ5066-1 (5" rectangular) in the SIAECOSYS TFT display lineup.

In brief: E-bike display. Protocols: SiAECOSYS ONE-LIN, SiAECOSYS CAN BUS. From $67 across 2 sellers.

Specs verified Sep 12, 2026

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Prices tracked across 2 sellers

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Specifications

Specifications

Protocols
SiAECOSYS ONE-LIN, SiAECOSYS CAN BUS
Screen Size
80mm
Light Control
No
Phone Charger
No
Bluetooth
No

Physical

Weight
190 g
IP Rating
IP65

Ports & Connectors

Main Connector
DisplayPower SwitchCAN Bus
PinWire colorFunction
1OrangeTurn Signal Left
2BlackPower Switch Signal
3GreenGround
4Light BlueTurn Signal Right
5BlueHigh Beam
6RedBattery +
7Green / YellowCAN Low
8Red / BlackCAN High
9PurpleOne-Wire Comm
USB Software Upgrade

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