Product Dimensions: 4.7x3.9x2.2 inch Highlights: 1.Increase Situational Awareness Details: *Features*:*Increase Situational Awareness*:With your ears left open,this bone conduction enables you to immerse in the new playlist while hearing the external sounds in order to decrease the risk of the accidents. Besides,you can also take a call while still listening to your colleagues or friends. *Comfortable Fit*:Since it rests on your cheekbones,your ears and ear canals won&#8217;t be involved at all,saving you from all of that soreness and pain. Additionally,this type of headphones was designed to fit snugly against your face,meaning they&#8217;ll stay put when you are moving around. The wireless design also means that you don't need to deal with pesky wires. *Wireless 5.1 Technology*:With its advanced wireless 5.1 connectivity,you can enjoy more freedom as it allows up to 65ft transmission distance. Provide you with faster and more stable connection,and high-fidelity sound. *IPX5 Waterproof*:No fear of sweat or dropping. Wear it at the fitness club. Enjoy the rhythm beat and feel your heartbeat. *Clean*:With this bone conduction headphone,no part of the apparatus goes inside your ears,avoiding ear infections and gross ear wax build-up. It will keep your ears healthier and cleaner than ever before! *Specifications*:Product Type: Wireless Bone Conduction Headphone Color: Black Material: ABS Pairing Name: BL09 Wireless Version: V5.1 Frequency: 2.4GHz Protocol Supported: A2DP1.3/HFP1.6/HSP1.2/AVRCP1.6/D11.3 Wireless Transmission Distance: 20m/65.6ft Battery: 180mAh Lithium Battery Charging Time: About 2Hrs Playtime: About 12Hrs Standby Time: 90Days Input: DC5V/1A Impedance: 32&Omega; &phi;10mm Sensitivity: -42Db Working Temperature: -10-50&#8451;/14-122&#8457; Waterproof Rate: IPX5 Cable Length: 26cm/10.2in Headphone Size: 12x10x5.5cm/4.7x3.9x2.2in; Head Circumference: 21cm/8.27in Headphone Weight: 15g/0.03lbs *Package Lists*:1 x Bone Conduction Headphone 1 x Charging Cable 1 x User Manual

V5.1 Wireless Bone Conduction Headphone Open Ear Sports Wireless Headset w/ Mic IPX5 Sweatproof