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**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

**Brief Introduction** SDU12 lightweight U‑lock solves the pain point of excessive weight of traditional heavy‑duty U‑locks adding riding burden. While preserving fundamental anti‑theft performance, overall weight is optimized downwards. Full‑wrap silicone bumper safeguards expensive bicycle frame paint. Key‑operated with included frame‑mount bracket. Highly suitable for road‑bike and performance‑mountain‑bike riders sensitive to equipment weight. Balancing security,

**Brief Introduction** SDU13 weather‑resistant U‑lock features upgraded protective‑jacket material engineered for persistent open‑air parking environments. Ordinary lock housings tend to age, harden, crack and peel after prolonged sun exposure. SDU13 adopts UV‑stabilized modified‑formula jackets retaining flexibility under continuous sun‑rain exposure and resisting brittle cracking. Equipped with alloy‑steel shackle, anti‑drill copper key cylinder and frame‑mount bracket.

**Brief Introduction** SDZ03 UFO‑shape combination folding lock inherits SDZ02’s iconic oval flying‑saucer silhouette while upgrading to keyless combination operation to eliminate key‑related headaches for cyclists. User‑adjustable resettable dials let riders set personalized passcodes. Multi‑segment alloy‑steel links guarantee anti‑cut anti‑pry security. Compact folded profile plus frame‑mount bracket permit direct on‑bike installation. Its highly recognizable oval UFO

**Brief Introduction** SDU08 combination U‑lock merges the robust anti‑theft strength of U‑locks with convenient keyless combination operation. Conventional key‑operated U‑locks frequently encounter issues of lost or forgotten keys. SDU08 adopts resettable digital dials so end‑users can set their own passcodes without carrying physical keys. The alloy‑steel shackle delivers reliable pry‑cut resistance. A dedicated frame‑mount bracket

**Brief Introduction** SDU11 heavy‑duty wide‑opening U‑lock is defined by its enlarged shackle clearance. Many ordinary U‑locks feature narrow openings insufficient for securing bikes together with thick lampposts or parking bollards. SDU11 expands inner shackle dimensions to lock bicycles alongside large‑diameter fixed posts. Its thick heavy‑duty quenched alloy‑steel shackle and anti‑drill copper key cylinder meet mainstream

**Brief Introduction** SDZ14 wide‑body rectangular folding lock addresses insufficient impact‑resistance of narrow‑segment conventional folding locks by widening lock‑blade cross‑sections for more uniform stress‑distribution against prying and hammer‑blows, mitigating deformation‑failure risks. Key‑operated with frame‑mount bracket for fold‑away portability. Targeted for customers requiring elevated security grades for e‑bikes and high‑power e‑bikes. **Material & Craftsmanship** Widened quenched alloy‑steel

**Brief Introduction** SDZ15 balanced‑spec rectangular folding lock is SENDE’s mainstream mass‑selling folding‑lock model. It rationally balances product weight, anti‑theft performance and procurement cost without excessive over‑engineering driving‑up prices or compromising baseline security specifications. Key‑operated alloy‑steel lock‑blades with frame‑mount bracket included. Validated via numerous overseas bulk orders with mature supply‑chain and reliable lead‑times. Ideal for large‑scale

**Brief Introduction** SDZ16 weather‑resistant‑shell rectangular folding lock upgrades lock‑segment bumper‑jacket material with UV‑stabilized modified engineering‑plastic compound. Many folding‑lock outer jackets degrade, crack and peel under continuous outdoor sun‑rain exposure, exposing bare metal segments prone to frame‑scratching and rusting. SDZ16 improves jacket formulation to retard outdoor brittling‑aging and preserve intact cosmetic lifespan. Alloy‑steel lock‑blades, key‑operation and