Features： 1、The infusion reminder equipped with a smart sensor can monitor changes in the liquid in the infusion tube in real time. 2、Lightweight and convenient, and the impact on the infusion tube is minimized. 3、The built?in lithium battery can be used easily for more than one year. If it is used intermittently, it can be used for several years (please keep it dry). 4、Detection sensor technology makes detection more accurate and stable. 5、Optimize one?handed operation and structural design to further enhance the portability and robustness of the product. 6、Optimize the circuit and structural design, and appropriately increase the sound volume stability without basically increasing the power. 7、It is suitable for infusion tubes of various medicines, blood, nutrient solutions, various materials and colors. Specification： Condition: Item Type: Infusion Fluid Reminder Optional Color: Red, White, Yellow, Pink, Blue, Green Size: Approx. 3.5 x 5.5cm/1.4 x 2.2in Built-In Battery Properties: Lithium Battery, 100mAh Instructions: Charge before use 1. Turn On: Clamp the reminder to the infusion tube, press the on button to hear the power?on prompt and enter the detection state, and the green light flashes at the same time. 2. Sound Switching: Press and hold for 3 seconds in the off state, release the button when you hear a beep, switch the sound successfully and power on and enter the detection state. 3. Reminder: When the liquid in the infusion tube changes from being to nonbeing, a reminder will sound, and the red light will flash. 4. Shut Down: Press the switch button, the sound will be prompted when shutting down, all the indicators will be off, and the work will stop. Package List： 1 x Infusion Fluid Reminder 1 x Charging Cable 1 x Hanging Rope