iHome iHM61. System type: single speaker, Recommended usage: universal, Speaker placement: Portable. Connectivity technology: Wired, Speaker interface type: 3.5 mm. Housing material: Plastic. Width: 59.94 mm, Depth: 64.01 mm, Height: 58.17 mm. Battery technology: Lithium-Ion (Li-Ion), DC input voltage: 5 V