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Parameter	Alcovisor Metrology	Alcovisor Mars SELFY
Price	€192.39	€199.65
Best for	Most affordable verifiable model	Remote employee testing with photo
Sensor	Fuel-cell sensor	Fuel-cell sensor
Accuracy	0,00–1,00 ‰: ±0,1 ‰; ties 1,0 ‰: ±10 %	0,00–4,5 ‰: ±10 %
Range	0–4,0 ‰	0–4,5 ‰
Response time	—	≤ 5 s
Memory	None	100 records
GPS	No	No
Bluetooth	No	Yes
App	No	Alcovisor Elite
Passive test	No	No
Printer	None	None
Verification	Yes	Yes
Menu	—	Lithuanian menu
Power	2 × AA	Li-ion 400 mAh · up to 700 tests
Weight	130 g	98 g
Warranty	jutikliui 24 mėn. (nekomercinei veiklai)	jutikliui 24 mėn. (nekomercinei veiklai)
Calibration	Recommended every 6 months	Recommended every 6 months

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Alcovisor Metrology €192.39 Alcovisor Mars SELFY €199.65