Mackie CR4-XBT Creative Reference Series 4" Multimedia Monitors w/ Bluetooth The built-in rechargeable batteries provide

The built-in rechargeable batteries provide up to 7 hours of operation and recharge via USB

7" and uses a locking thumbscrew for safe and quick lock and release

made out of aluminum

either to the left or right

and also to protect the electronics internals against failures caused by vibrations

Mackie CR4-XBT Creative Reference Series 4" Multimedia Monitors w/ Bluetooth The built-in rechargeable batteries providehe Mackie CR4 XBT is a pair of Bluetooth enabled Creative Reference Series 4" multimedia monitors offering a compact solution for quality audio playback in home studios and gaming setups. With 50W of amplification driving 4" woofers and 0. 75" tweeters, the CR4 XBT monitors work well whether you're creating content or casually enjoying some tunes. The pair consists of one passive speaker and one powered speaker that connect with an included speaker