Feature: 1. Infusion reminder device equipped with smart sensor can monitor the change of fluid in infusion tube in real time. It is suitable for infusion tube of various kinds of liquid, blood, nutrient liquid, various materials and colors. 2. Light and convenient: the weight is 15 g / 0.5oz(approx.), and the impact on the infusion tube is minimal. 3. Built‑in lithium battery, effective storage life of 5 years, can easily continue to use more than a year, if intermittent use can be used for several years (pay attention to dry storage). 4. Sensitive and accurate, detection sensing technology, detection more accurate and stable. 5. Optimize one‑handed operation and structure designs, and improve the portability and fastness of the product. 6. Clear and bright warning sound, properly improve the sound volume stability, so as to achieve better alarm effect. Specification: Condition: 100% Brand New Item Type: Infusion Fluid Alarm Material: ABS Optional Color: White, Blue, Pink Size: Approx. 5.5 x 3.4cm / 2.2 x 1.3in Built-In Battery: lithium battery, 100mAh Usage: Charge the battery before use 1. Power on: Long press the "On" button for 2 seconds and hear the sound of "di". Power on enters the detection state, and the green light starts flashing.2. Remind the alarm: when the liquid in the tube changes from there to no change, intermittently emit di.Prompt alarm sound, while the red indicator light flashes.3. Volume switching: In the boot state, press the on key "di" to switch freely.4. Power off: Long press the on key for 2 seconds and hear "Beep beep" to power off. All lights will be off.. Package List: 1 x Infusion Fluid Alarm1 x Charging Cable Note: 1. Built‑in lithium battery, which can be charged at any time.2. The red light is constant on when charging and the green light is constant on when full charged.3. Suggestion: Full power storage can prolong service life.4. Pay attention to the upper and bottom order when using.