Mono portable speaker InLine 55383 — Black, driver 2.8 cm, Bluetooth 2.4 GHz (range 10 m)

The InLine 55383 mono portable speaker in black is a compact audio solution with a 2.8 cm driver and a frequency response of 180–20,000 Hz. It pairs wirelessly via Bluetooth (2.402–2.48 GHz) with an approximate range of 10 m and weighs 0.055 kg, making it suitable for on-the-go use, small gatherings and personal audio needs. The speaker includes button volume control and an integrated microphone for hands-free communication.

Advantages

The lightweight, clip-style design keeps the speaker close to the ear for clear intelligibility of voice content and navigation instructions without high playback levels. Bluetooth connectivity provides a simple wireless link to phones and other sources within an approximate 10 m range. The built-in battery delivers up to 10 hours of runtime on a single charge and recharges via USB-C. Robust construction with an IPX7 protection rating ensures functionality in rain, splashes and humid conditions. Two compatible units can be paired to play the same content simultaneously, with one unit acting as the controller for playback and calls.

Suitable for

• Hands-free phone calls and voice announcements while working or moving
• Personal audio and small outdoor gatherings
• Use in workshops, assembly lines and humid or changeable environments
• Navigation voice prompts and guided tasks

Key specifications

• Driver diameter: 28 mm (2.8 cm)
• Driver impedance and power: 4 Ω / 2 W
• Frequency response: 180–20,000 Hz
• Wireless band and range: 2402–2480 MHz, approx. 10 m
• Battery: Lithium‑ion 600 mAh (3.7 V), up to 10 hours playback
• Charging: USB‑C, recommended 5 V / 1 A, charging time approx. 2 hours
• Standby consumption: approx. 0.007 mA ± 0.005 mA, auto standby after 15 min
• Protection class: IPX7 (waterproof for immersion and splashes)
• Dimensions: 72 × 40 × 24 mm
• Weight: 0.055 kg
• Built-in microphone for hands-free communication

How to use

Attach the speaker to clothing or equipment using the clip so the driver faces toward your ear for best intelligibility. Turn the unit on and enable Bluetooth on your source device, then select the InLine speaker from the list of available devices. Adjust volume with the physical buttons. Use the integrated microphone for hands-free calls; one paired speaker will control playback and call functions when two units are connected. Recharge the speaker via the included USB‑A to USB‑C cable and the recommended 5 V / 1 A adapter; a full charge takes approximately 2 hours.

Usage recommendations

For reliable voice transmission, keep the clip positioned close to the ear and avoid covering the microphone. To preserve battery life, switch the speaker off when not in use or rely on the auto standby after 15 minutes. In wet conditions rinse off debris and dry charging port before connecting a cable; the IPX7 rating protects against immersion but regular maintenance extends service life.