Mechanism: yes available sim cards: no system: android, ios gps: no type: on the wrist compatibility: all compatible rom: <128mb function: pressure gauge, fitness tracker, sleep tracker, sms reminder, call reminder, answer call, dial, 24-hour indication, alarm clock, interactive music rear camera: none memory: <128mb waterproof rating: waterproof multi-dial: yes battery capacity: 180-220mah network mode: none cpu model: mtk2502 style: sports movement type: electronic screen shape: square resolution: 240 * 240 app download available: no case material: alloy display size: 1.54 strap material: silicone application age: adult removable battery: no detachable band: yes