Apple HomePod

Audio Technology:

High-excursion woofer with a custom amplifier.
Five horn-loaded tweeters, each with its own custom amplifier.
Room sensing technology for adaptive sound.
Spatial audio with Dolby Atmos support.
Siri Intelligence:

Voice recognition for hands-free control.
Integration with smart home accessories.
Sensors:

Sound Recognition.
Temperature and humidity sensing.
Wireless:

802.11n Wi-Fi.
Direct guest access.
Bluetooth 5.0.
Thread support.
Ultra Wideband chip for device proximity.
Dimensions and Weight:

Height: 6.6 inches (168 mm).
Width: 5.6 inches (142 mm).
Weight: 5.16 pounds (2.3 kg).
System Requirements:

iPhone SE (2nd generation) or later, or iPhone 8 or later with the latest iOS.
iPad Pro, iPad (5th generation or later), iPad Air (3rd generation or later), or iPad mini (5th generation or later) with the latest iPadOS.
APPLE.COM

HomePod mini

Audio Technology:

Full-range driver and dual passive radiators for deep bass and crisp high frequencies.
Computational audio for enhanced sound quality.
Siri Intelligence:

Voice recognition for personalized experiences.
Smart home control capabilities.
Sensors:

None specified.
Wireless:

802.11n Wi-Fi.
Direct guest access.
Bluetooth 5.0.
Thread support.
Ultra Wideband chip for device proximity.
Dimensions and Weight:

Height: 3.3 inches (84.3 mm).
Width: 3.9 inches (97.9 mm).
Weight: 0.76 pounds (345 grams).
System Requirements:

iPhone SE, iPhone 6s or later, or iPod touch (7th generation) with the latest iOS.
iPad Pro, iPad (5th generation or later), iPad Air 2 or later, or iPad mini 4 or later with the latest iPadOS.