Product Features Professional studio-grade wireless monitoring earphones Dynamic micro-driver provides wide frequency response (20 Hz - 20 kHz), delivering full bass and detailed highs Bluetooth 5.0 technology for exceptional sound quality with up to 10 m (33 ft) of wireless freedom Supports Qualcomm aptX high quality and low latency audio for enhanced video watching and gaming experiences Built-in CVC 8.0 isolates the user's voice from surrounding clutter for clear phone conversation Sound-isolating design with a variety of sleeves to block outside noise for detailed musical experience Secure over-the-ear design ensures earphones stability and comfort 360-degree rotating gold-plated MMCX lock-snap connector for flexibility and versatile connectivity options Bluetooth communication cable for seamless phone calls and effortless music controls Up to 7-hours of battery life - USB charging cable included Zipper carry case included to enjoy your music on-the-go Includes foam and silicone earplugs in 3 sizes to ensure a perfect fit SD251-BT – Professional In-Ear Studio Monitors Whether you’re mixing a recording or monitoring a bass line, you want earphones that deliver high-definition bass and super-transparent highs across an ultra-wide dynamic range. Our SD251-BT in-ear monitors fulfill your need to compose your own tunes in peace, no matter where you are – at a price that is very kind to every budget!

Unparalleled Comfort & Isolation Secure over-the-ear and ultra-lightweight design of SD251-BT monitors allows you to keep them on for extended studio, chat, or gaming sessions without any feel of weight over your head. 3 sets of ultra-soft earplugs provide perfect fitment for all ears with lasting comfort.

Ultra-Long Life Battery Backup When fully charged, your SD251-BT provides up to 7 hours of music playback. They come with high-quality USB charging cable for quick charge on the go. A low battery voice prompt is also built in for convenience.

Soundstage True companion of musicians and composers – high-quality electromagnetically shielded design isolates all vicinity noises present in an electronic gadget-filled studio environment. Top-grade neodymium micro-drivers deliver high-fidelity audio for instruments and vocals.

Low Latency Technology The SD251-BT comes with a built-in aptX™ audio codec from Qualcomm* for ultra-low latency that enhance movie watching and gaming experiences.

Music & More SD251-BT’s outstanding performance goes far beyond its high-quality sound, with features that include a built-in microphone for crystal clear hands-free calling, automatic pairing with your phone or any Bluetooth* playback device, convenient multi-function button controls for power, pairing, play, stop, skip, call answering, and much more. Your SD251-BT will become your new favorite go-to device for your life on the go!

SPECIFICATION Driver 6.8 mm Impedance 22 Ω Frequency response 20 Hz to 20 kHz Sound pressure level (SPL) 93 dB @1kHz (105 dB peak) Rated power 3 mW Bluetooth* Version 5.0 Frequency range 2402 MHz ~ 2480 MHz Channel number 79 Max output power 5 dBm Bluetooth range Up to 10 m (33 ft) in line of sight CODEC support aptX, AAC, SBC Call support CVC 8.0 Mic sensitivity -42 dB (±3 dB) @ 1 kHz, 0 dB = 1 V/Pa Battery type Rechargeable lithium battery Working time Up to 7 hrs Standby time Up to 150 hrs Charging time 1 hr via USB 5 V / 500 mA Cable Shielded, detachable Connector  MMCX connector, detachable Cable length  25 cm (10") headphone color - black *The Bluetooth® word mark and logos are owned by the Bluetooth SIG, Inc., and any use of such marks by Music Tribe is under license.