Product name Aomale Model no. BT-S45/S49 Bluetooth version V5.0+EDR Operating distance 10m Range of frequency 2.4 to 2.4835GHz ISM band Type stereo headphone with mic Speaker 14.2mm Talk time upto 18hour Music time 26-35hour Standby time upto 900hour Support for camera, especially for photographing self conveniently and anytime and anywhere, better enjoy the pleasure of taking picture. Support bluetooth stereo devices to receive A2DP stereo music from from laptop computer, tablet PC, iphone,blackberry, bluetooth adapter, or another device that supports bluetooth stereo audio. Introducing the Aomale 420mAh Sport Wireless Music Neckband, crafted for those who desire deep bass and exceptional sound quality. With Bluetooth connectivity, this neckband provides the freedom to move without the inconvenience of wires. The built-in microphone enables hands-free calls, while the TF memory card slot offers convenient storage for your favorite tunes. Ideal for active lifestyles, this neckband delivers stereo sound and a 420mAh battery for extended listening sessions. Whether you're working out or on the go, this neckband offers comfort and high-quality audio. Plus, the TF memory card slot allows you to carry your music library with you. Stay connected and entertained with this versatile and powerful neckband.