Check the listing for details. 1-50 Pcs Mini Digital Indoor Thermometer Hygrometer Temperature Humidity Meter. Color: Black, Condition: New. Listed at 9.44 USD. 1-50 Pcs Mini Digital Indoor Thermometer Hygrometer Temperature Humidity Meter FEATURE: * LCD digital display. * Compact design, easy to carry. * Digital hygrometer and Celsius temperature reading. * A wonderful assistant for you to get timely temperature and humidity. * Can be widely used in home, office, car, hotels, laboratories, etc. SPECIFICATION: Humidity: humidity measurement range 10%~99% Humidity display resolution 1% Humidity sampling cycle 10 seconds (1 minute) Humidity measurement accuracy ± 5% Temperature: Temperature measurement range -50 to 70 Temperature measurement accuracy ± 1 degree (at room temperature) The product comes with an internal battery and does not come with insulation USAGE METHOD: Install battery LR44 * 2, and the display screen will automatically display humidity and temperature INSTALLATION OF BATTERIES: ① Flip over to the back of this product; ② Push open the battery cover in the direction indicated by the arrow; ③ Place two LR44 button batteries into the battery compartment ITEM INCLUDED: 5/10/15/20/30/40/50 Pcs Digital Hygrometer ThermometerPaymentShipping & HandlingReturns PolicyContact USFeedbackPaymentShipping will be arranged only your payment is cleared.We accept payment by PayPal only.Shipping & HandlingWe ship the same business day if paid by 4pm EST(1pm PDT).We don't ship to APO/FPO and Post Office box addresses, Alaska, Hawaii and Puerto Rico.No shipping on Weekend or Public Holidays & No responsibility for any customs duty.Returns PolicyWe offer a 60 day money back guarantee or exchange.Buyer pays return shipping and we pay replacement shipping.If you want to initiate a return,please contact us to get a returning address before sending the item back.Contact USWe hope that every transaction can have a happy ending. And if you have any more problems, please feel freeeee to contact us. we'll do what we can to help. FeedbackWe believe communication can result in a happier ending before you leave a red or gray feedback. And this account is my baby. I do care about it and will do what I can to protect it.