Advanced Acoustic Technology Corp. (AATC) AKS-1308-1 Micro-Speaker offers a 0.7W rated input power with a 1W maximum input power and a 1100Hz ± 20% resonance frequency. This micro-speaker delivers a high sound output despite its small size of 13mm x 13mm x 4mm. Due to the AATC AKS-1308-1 speaker's small size, it is well designed for small portable devices.