<div class="detailmodule_html"><div class="detail-desc-decorate-richtext"><p style="text-align:left" align="left">Product Name: M90 PRO</p><p style="text-align:left" align="left">Product: wireless headphones earphone</p><p style="text-align:left" align="left">Duration: 5H</p><p style="text-align:left" align="left">Bluetooth protocol: 5.3</p><p style="text-align:left" align="left">transmission range: 10 meters</p><p style="text-align:left" align="left">whether single-binaural: bilateral stereo</p><p style="text-align:left" align="left">Protocol: Supports HFP 1.7. HSP 1.2 AVRCP 1.6, SPP 1.2 and PBAP 1.0</p><p style="text-align:left" align="left">Speaker Diameter : 8mm</p><p style="text-align:left" align="left">Working distance: 10m-20m</p><p style="text-align:left" align="left">Call Time: 5-6H (1 time full charged)</p><p style="text-align:left" align="left">Play Music Time: 5-6H (1 time full charged)</p><p style="text-align:left" align="left">Standby time:650H (With charger case)</p><p style="text-align:left" align="left">Frequency:2402MHz~2480MHZ</p><p style="text-align:left" align="left">Battery type: 3.7V, &gt;50mA Li Battery</p><p style="text-align:left" align="left">Charging Time: 1-2H</p><p style="text-align:left" align="left">Working Temperature: -10°-55°</p><p style="text-align:left" align="left">Specification of charger case:</p><p style="text-align:left" align="left">Input current: 5V= 1A</p><p style="text-align:left" align="left">@ Output current: 5V = 1A</p><p style="text-align:left" align="left">Battery type: 3.7V</p><p style="text-align:left" align="left"><strong>@ Charging time: 1-2H</strong></p><div><br/></div><p><br/><br/><br/></p><p style="text-align:left" align="left"><strong>Accessory lists:</strong></p><div><br/></div><p><br/><br/></p><p style="text-align:left" align="left">2 * Bluetooth headphones</p><p style="text-align:left" align="left">1 * Charging case</p><p style="text-align:left" align="left">1 * USB cable</p><p style="text-align:left" align="left">1 * User Manual</p><p style="text-align:left" align="left">3 * headphone cups (S, M, L size)</p><div><br/></div><div><strong>Notes:</strong></div><div> </div><div>If the headset you received has only one earbud to use for the first time, then you can do as I said, delete the bluetooth name in the phone, take all the earbuds out of the charging box, and then pair it again</div><p></p></div></div><p><br/></p>