World's first and lightest most portable alarmed disc-lock. Just 418 grams features a 6mm hardened steel locking pin. The broadest fit of any XENA lock, fitting virtually any two-wheeler with a brake disc. (including some ebikes) Pushdown mechanism 120dB alarm linked to shock and motion sensors sounds the LOUD alarm. Alarm will sound for 15 seconds before re-setting itself to armed mode.