ABS material: Rechargeable Infusion Reminder Intravenous Drip Warning Device is made of ABS material, strong and wear-, waterproof, minimal risk of damage, 50mAh battery capacity, long service life. Universal compatibility: Infusion Alarm is suitable for various nutrient solution, blood and other infusion. Compatible with different materials, different thickness, different colors, different transparency of the infusion tube. It ensures no direct contact with the and prevents infection. Audible and visual prompts: When there is no fluid in the infusion tubing, it emit intermittent dripping sounds and flashing lights to clearly indicate the infusion status and allow for real-time monitoring of changes in the fluid in the infusion tubing. This infusion alarm requires you to whistle to trigger it., Manufacturer: Ounfhtrttk