Lexin B4FM-X 10 Bikers Bluetooth Motorcycle Intercom Helmet Headsets Color:Single pack 1PC • Head circumference: 20 ½”

• Head circumference: 20 ½” - 21 ⅝”

Meterial: Cotton

CPU Model: MTK

Style: In-ear

4 112 75 62 41 175 75 XL 47

Lexin B4FM-X 10 Bikers Bluetooth Motorcycle Intercom Helmet Headsets Color:Single pack 1PC • Head circumference: 20 ½”SPECIFICATIONS talking time: Up to 8 Hours Talk Time power supply mode: built in battery noise reduction: DSP wind noise reduction technology connection mode: bluetooth applicable helmet type: universal Working speed: Up to 150km h Speed Waterproof: IP67 Rainy proof Stereo music audio: A2DP enabled cell phone MP3 GPS Special function: universal pairing function Special feature2: Music Sharing Special Function: Universal Pairing Function,voice