No batteries required, just wind up this Pink heart radio and the music will keep you entertained. The Ecotronic Radio will never run out of Energy, just keep on winding . This smart wind up FM/ AM Radio with auto station finder comes complete with mobile phone charger and adaptors for Old and New Nokia, Samsung, Sony Ericsson and Motorola phones. This Radio is supplied in Gekopak™ Bio-degradable packaging that's easy to open, has no dangerous ties and wires and uses nothing but recycled paper. Specifications Radio size - H 80mm x W 75 mm x D 35mm Phone charger adaptors – Old /New Nokia, Samsung, Sony Ericsson, Motorola. Channels – FM & AM Headphone input socket. DC Power output socket.