sound modules for greeting cards

Children learning books for kids 1. Size: 300*300mm (customer can have their own size also) 2. We can make the sound module only, also can make the module and book; the plastic case is our exsitting mold, customer can have their own design, we accept OEM/ODM orders. 3. Batteries:Lithium battery*1pcs or AAAbattery*2pcs. 4.Three way switch (ON/OFF/VOL) 5.With standard sound or custom voice, such as the animals sound, transportation sound, melody voice, human talking voice 6.Up