**Brief Introduction**
SDU03 fingerprint U‑Lock belongs to SENDE smart‑security product line, combining classic high‑security U‑lock architecture with modern biometric fingerprint recognition technology, targeting premium e‑bikes and high‑power electric bicycles. It eliminates troubles caused by lost keys or forgotten passcodes with instant touch‑to‑unlock fingerprint access. The heavy‑duty alloy‑steel shackle comes with full‑coverage silicone bumper to safeguard frame paint. Built‑in rechargeable lithium‑ion battery supports USB‑C cyclic recharging. Positioned for mid‑to‑high‑end markets, this model fits premium accessory retailers and OEM matching for e‑bike complete‑vehicle factories with attractive profit margins.

**Material & Craftsmanship**
Thickened quenched alloy‑steel shackle for outstanding cut and hydraulic‑attack resistance. Full‑wrap eco‑friendly high‑elastic silicone shell prevents frame scratches and impacts. High‑strength ABS main housing. Semiconductor fingerprint‑recognition module paired with low‑power rechargeable lithium‑ion cell and USB‑C charging interface. Basic dust‑water‑resistant treatment enables outdoor rain‑exposed usage. Complete set of frame mounting bracket included.

**Key Features**

1. Semiconductor fingerprint identification supports registering multiple user fingerprints for instant touch‑unlock without keys or combinations.
2. Heavy‑duty alloy‑steel shackle inherits superior anti‑pry and anti‑cut performance of traditional U‑locks.
3. Full‑coverage silicone bumper protects high‑value e‑bike frame paint from collision scratches.
4. USB‑C rechargeable lithium‑ion battery with low‑power consumption supports thousands of unlock cycles per full charge.
5. Supplied with frame‑mount bracket for secure on‑bike storage during riding.
6. Comprehensive OEM options: custom housing colors, laser‑engraved logos, tailored user manuals and premium color‑box packaging.

**Application Scenarios**
Premium power‑assisted e‑bikes, high‑power electric bicycles and performance mountain bikes for mid‑to‑high‑end cyclists seeking smart convenient security experience.

**OEM & ODM Service**
Custom fingerprint‑module parameters, appearance colors, logos and full packaging sets. Supports project‑oriented cooperation with complete‑vehicle manufacturers.