... -TM10BM (electronic keypad lock)Unlock method: password, sound and light prompts, the user's own password-based systemMaterial: After ... 4 times to empty lock. 3. LED indicator, emergency external power supply and low voltage to alarm. 4. Working voltage: ... + 15 KV Applicable to agent, school, SPA/sauna bath center, swimming pool, gymnasium, golf course, supermarket, hotel, company, factory, household, ...