We have the below from Amazon and we literally never turn them off. They have been running for a whole year and they have been great. I will say I wish the settings and volume were easier to see/feel but since we don’t turn them off, it’s not too terrible.

White Noise Machine with 14 Soothing Sounds and Warm Night Light for Sleeping, 5 Timers and Memory Feature Plug in Sound Machine for Baby, Adults-White https://www.amazon.com/dp/B09SG9TZNS/ref=cm_sw_r_cp_api_i_QNFFGDKSPW670QKYPW3P