Review on NETVIP Bluetooth Handsfree Speakerphone: Wireless Car Kit & Portable Music Player with Back-Clip Speaker for Cell Phone - Siri/Google Assistant/TF Card Compatible by Justin Hollins

Battery life is great. Charging time is not an issue as I plug it into the adapter in the truck to charge when needed. I sometimes knock it out. Loud enough to hear typical road noise at highway speeds. You have to press the button to turn it on when you get in the car and it usually takes 3-5 seconds to pair. The device will turn off automatically when the Bluetooth connection to your phone is lost. You can answer calls by pressing the large central button. I recommend this model over the Veopluse B Pro 2B (another great option). I drive a few hours a day to work and wanted to switch from headphones to speakers. Both have great battery life, both are loud, but the B Pro just wasn't loud enough to beat road noise at highway speeds. I gave the B Pro to my wife who doesn't have a radio and often uses it for audiobooks and calls when she commutes across town. The Veopulse B Pro uses a motion sensitive gyroscope (slamming the car door) to turn itself on automatically, which is nice and the only advantage I've found over this model.