Attention: Welcome to my shop! We ship the product from China, the delivery time is 7-14 days!Support Bluetooth mode: A2DP 1.2, AVRCP 1.0, HSP, HSF 1.5Frequency: 2.402-2.480GHZReceive sensitivity: -84dBm; maximum transmit power 4dBmFrequency Response: 20 Hz - 20 KHzSignal to Noise Ratio (SNR): 80Db;Total Harmonic Distortion (THD): 0.1%Working distance: Music distance is more than 15 meters, call distance is more than 10 metersThe distance between the ears is more than 3 meters, and the turning movement does not stopSpeaker: 8mm high quality copper ring speaker, sensitivity: 99+-2DBBattery capacity: headset 35MAH lithium batteryCharging port: shrapnel contact 5V chargingCharging time: about 2 hoursTalk time: about 3 hoursMusic playback time: about 3.5 hoursOperating temperature: -20oC - 55oCCharging compartment battery: 220MAH, with protective plateSupport in-ear detection, support wireless charging (optional), support single and double ear use, support renaming and positioning, bare metal weight: 28G, package weight: 92G