DESCRIPTION: Apple APP iOS Android 4.3 with Bluetooth4.0 European Fuel cell sensor Bluetooth for wireless Replaceable mouthpiece 1 pcs AAA battery (500 tests) Size: 80x50x18mm Display: 0.00-4.00â?° (2.00mg/L) Accuracy: +/- 0.05â?° at 0.50â?° (APP on Smartphone) Alcohol limit/unit selectable Recall tested memory