Specification:Condition: brand new Power by 2 x C Battery(Not Included) Material: ABS Plastic and Electronic Components Pipe Length: 1m /39.37inch Length: 58-94cm(adjustable) / 22.83"-37" (adjustable) Maximum : 520L/h Maximum length: approx. 94 cm/ 37.01 in Maximum water level: approx. 75 cm/ 29.53 in Color: Beige & gray Package Weight: Approx.395g Package List: 1 x Motor 1 x Intake 2 x Extension Tube 1 x Fish Straw 1 x Filter Mesh Bag 1 x Sand Washing Sets 1 x Cleaning Brush Head Notes: 1. Installed water siphon, the nose and the outlet must in water, and start the switch! When the water outlet draw the water, raise the gravel cleaner, let the head and outlet the water. 2. Due to shippment,2 batteries are not included. Question: This product may stop work intermittently. Solution: 1. The interior is dirty and needs cleaning. 2. You need to replace the battery.