Warning before use GVDA GD316 GD317 Digital Brix Sugar Refractometer Electronic Sweetness Meter Saccharimeter Measurement Range 0.0-55% Brix for Water Fruit Crops

1. Digital Saccharometer is precision instrument, do not collision it.
2. Do not scratch optical prism in measuring tank.
3. Full charged, packed in a protective case and placed in a dry environment, if device is not used for a long time.
4. The voltage should not exceed DC5V.
5. Not waterproof, you can use water rinse the measuring tank, but not whole device.