An electronic device is provided which includes a first substrate, a speaker disposed on the first substrate, a second substrate, and a sound conditioner. The sliding groove is formed at the second substrate, and a first sound outlet and a second sound outlet are connected to the sliding groove. The sound conditioner is slidably disposed in the sliding groove between a first position and a second position. With the change of the position of the sound conditioner, sound produced from the speaker is transmitted to the outside via the first sound outlet or the second sound outlet.