Jardin Aquarium Fish Tank Battery Powered Portable Air Pump Single outlet portable fish tank air pump features plastic construction with on/off switch and steel belt clip Power: two 1 5v size d batteries (not included) Dimension: 13L) x 7. 4(W) x 4. 5(H)cm Weight: 172g Package included: 1 x portable aquarium air pump; 1 x air stone with tube