Note:Since the aviation security is very strict，we feel so sorry about that we can not send the battery to you.We have reduced the relevant price， would you please purchase the battery(AG-13) in local after you receive the products? Description:This digital pen style pH meter is an ideal instrument for aquarium， fishing industry， swimming pool， school laboratory， food & beverage etc. 100% brand new meter with calibration screwdriver Excellent meter， very acurate and durableSpecification: Measuring pH Range: 0.0 - 14.0 pH Resolution: 0.1 pH Accuracy: ��0.1 pH (20��C)， ��0.2 pH Operating Temperature: 0 - 50��C (32 - 122��F) Calibration: manual，1 point (Note: The battery is not included.) Dimensions: 152 x 29 x 15mm (5.984 x 1.142 x 0.591 inch)Package Included: 1 x Digital pH meter 1 x Calibration Adjustment screwdriver 1 x User instruction(English) Note: As different computers display colors differently，the color of the actual item may vary slightly from the above images.