The JBL PartyBox 720 carries an IPX4 ingress protection rating, making it resistant to sweat and light moisture exposure. It has a physical control panel mounted directly on the unit and a detachable cable, while a touchscreen, remote control, RGB lighting, and a travel bag are not included. The speaker has a volume of 159.10 cm³ and measures 94.2 mm in height, 41.6 mm in width, and 40.6 mm in thickness, with a total weight of 31,000 g. It does not use a neodymium magnet and is not a neckband-style speaker.
The JBL PartyBox 720 delivers a combined audio output of 2 x 400W and covers a frequency range spanning from 32 Hz up to 20,000 Hz, allowing it to reproduce both low and high ends of the audible spectrum. It does not include a noise-canceling microphone or magnetic shielding.
The JBL PartyBox 720 runs on a built-in rechargeable battery that offers up to 15 hours of playback and fully recharges in 3 hours. A battery level indicator is included so the remaining charge is always visible. The battery is not removable, and wireless charging is not supported.
The JBL PartyBox 720 connects wirelessly via Bluetooth 5.4 with a maximum range of 10 meters, and also supports Auracast for broadcasting audio to compatible receivers. Wired connectivity options include an AUX input, a USB Type-C port, and a microphone input, though there is no 3.5 mm headset jack, 3.5 mm male connector, or external memory slot. Wi-Fi, Ethernet, DLNA, AirPlay, and Chromecast are not supported, and on the audio codec side, aptX, aptX HD, aptX Adaptive, aptX Lossless, aptX Low Latency, LDAC, AAC, and Bluetooth LE Audio are all absent. NFC pairing is likewise not available.
The JBL PartyBox 720 can be used wirelessly and supports smartphone remote control, allowing playback management from a connected device. It includes voice prompts for audio feedback and a sleep timer for scheduled shutoff. Fast pairing, voice commands, a mute function, and a built-in radio are not available on this speaker.
The JBL PartyBox 720 supports stereo pairing, allowing two compatible units to be paired together for a stereo sound configuration.