3 or above
Transparent lenses: It can resist the reflected light of smooth object surface and 99% harmful light
and incredible 30 meters Wireless Bluetooth connection Range
Ideal for controling car horn
And you can mark current important events with temperature + time in up to 5 groups
United Scientific™ UniSafe™ Laboratory Grade Wide Mouth LDPE Vented Chemical Wash Bottle, Sodium Hypochlorite, 500mL (16oz), 4-Color, Pack of 6 update_march2023 3 or aboveUnited Scientific UniSafe Laboratory Grade Wide Mouth LDPE Vented Chemical Wash Bottle, Sodium Hypochlorite, 500mL (16oz), 4 Color, Pack of 6 United Scientific UniSafe printed wash bottles are made from industrial grade low density polyethylene with polypropylene closure and venting assembly. They are pre printed with the Chemical name and formula, the National Fire Protection Association (NFPA) Section 704 Four color Diamond, health hazards, Chemical