Mini Aquarium heating rod Fish Tank Aquarium Heater Submersible Thermostat Heater 18-34C Adjustable Temperature USB ChargingProduct Description :Product name: Mini heating rodMain body size: 2.5 * 5.6cmLength of power line: 1.3mScope of use: small fish tank/pet water dispenserTemperature control range: 18-34 CProduct power: 10WInput power: 5V 2ASuitable for: about 2L water capacityProduct features:1. Automatic constant temperature and high temperature protection.2. USB plug can be connected to the mobile phone charger or the charging bank.3. External temperature regulation, temperature control range: 18-34 C.4. Quartz explosion-proof material is safe to use.5. Small size, 52mm long heating rod, as big as the thumb, more beautiful.6. The water level can be as low as 2cm and can be used by both fish and turtles. It can be used in fresh water, seawater fish tanks, pet feeders, etc.Note:Be sure to use 5V2A charger for power supply. If you use a charger with insufficient current, the flash screen will not be heated.This product is suitable for 2L water capacity.Two heating rods can be used in one fish tank to increase the heating capacity, for example, two heating rods can be used simultaneously in a fish tank with 4L water capacity.However, only one heating rod can be used at the same time when one charger or power pack has multiple USB ports, otherwise it will cause heating failure or poor heating effect.