An amplifier is integrated into the device. An audio amplifier takes a small signal and makes it bigger without making any other changes in it which results in better sound, so any sound source can be connected to speakers.
65% have it
12. has an AUX input
An auxiliary input allows you to play other audio sources by connecting them through a simple audio connection like a 3.5mm jack, i.e for MP3 or portable DVD/CD player.
84% have it
13. Has WiFi
The device can connect to WiFi.
45% have it
14. maximum bluetooth range
The device can connect at a greater distance via bluetooth / infrared to another device.
A standard 3.5mm male connector is suitable for use with all MP3 players and computer sound cards.
47% have it
23. has AirPlay
AirPlay allows wireless connection of Apple devices with external screens or speakers. You may stream computer screen, video and music from iOS devices, play games like on consoles or present your slideshows easily on your TV.