Speaker Specifications:Wireless: V5.0Support: L2CAP/A2DP (AVCTP/AVDTP/AVRCP),Can receive audio signals and control audio equipment.Supports /HFP (Hands Free Profile).Built-in microphone device, support hands-free phone callsWorking distance: 30 feetSNR: Greater than 95dbEarplug Specifications:Wireless version: V5.0RF Transmission: Class 2Transmission range (HZ): 2.402GHZ-2.480GHZTransmission distance: 10MWorking voltage: 3.0V-4.2VMIC sensitivity: -42dBFrequency (HZ): 50HZ-20KHZBattery: 3.7V500mAh Playing time (70% volume): 2.5 hoursSupport profiles: HFP, A2DP, AVRCPCharging time: 2.5 hoursSpeaker Driver: 42mm: 4Q/5Frequency Response: 120Hz-20KHzUnit size: 98Lx98Wx38H mmCharging: 5V/500mAStandby time: 120 hoursPlaying time (70% volume): 2 hoursTalk time: 2 hoursCharging time: 1 hourSNR:Greater than 95dBBattery capacity: 40mAh (each earbud)Colour:greenMaterial:ABSPackage Contents:1 x 2 in 1 earphoneOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.