FLEXIBLE ACCESS CONTROL Enjoy the elegant and attractive design. Small and smart. Control your door lock with your smartphone... wherever you are. Standard CR123 batteries - with ultra-low energy consumption, you can operate the lock for 6 to 8 months. SPECIFICATIONS: - Model: TLV2.0 - Weight: 196 g - Dimensions: Ø 58 mm x 65 mm - Operating temperature: 10-40°C - Operating humidity: max. 65% - Made in Poland, EU - Power supply: 3 x CR123/CR123A - Communication Security: TLS 1.3