Jebao SOW Wavemakers are available in models (SOW-4, SOW-5, SOW-8, SOW-9, SOW-15, SOW-16, and SOW-20). Similar to the previous OW series, the biggest updates to the Jebao SOW Wavemakers is the continued improvements of the motor, which has been significantly improved to withstand damages, and having it much more silent than previous models.