... to learn4.340g(including the battery)light weight,small size and ergonomics designing5.More than 4.5 hours for continuous operation ... ,ready anywhere,anytime,with internal rechargeable battery and instant power-up6.Waterproof and dustproof probe,and can be easily cleaned by flowing water ... Measurement:Distance,Area,Volume,Heart RateOB Measurement:Pig-HL Sheep/Goat-USD Bovine-BL.SL,HL Cat-HD,BDDog-BD.GSD ...