Review on 📱 TUNAI Button Bluetooth Remote Control Kit: IPX7 Waterproof Phone Controller for Car, Bike, and Motorbike Steering Wheel - Stereo, Audio, Siri & Camera Control for iPhone and Android by Ryan Hart

I give this unit the lowest rating because it shuts down after a very short time rendering it unusable. They say press any button or key to wake it up but that doesn't work whereas usually you have to go back to the sound source and set everything up again. Apparently no one knows how to make a device with an off and on button. They all clearly think we want them to turn off the devices for us to make them useless again. I advise people not to buy this product.