Storage temperature: -20~60 (The actual time may be different under different mobile phone types or different usage conditions) (The working distance will have some deviations due to the influence of environment and climate) Product functional advantages: 1 The product uses Bluetooth 5.1 chip, more power saving, low latency, no noise, stable high-quality audio transmission, intercom distance of up to 800~1000 meters, full-duplex intercom Bluetooth headset (can carry out two-way signal transmission at the same time (AB and BA)) 2The product can be connected to two mobile phones at the same time to realize the control of the basic functions of the mobile phone (receive calls, play music, radio and FM), and can also be connected with third-party Bluetooth headsets to meet all customer needs 3The product supports IOS, some of the headset power display of the ANDROID system, check the power anytime, anywhere, at a glance 4The product is designed with IP67 high-level waterproof, even if it is used in rain or snow, it will not be affected at all 5The product adopts multi-function buttons with large rotating parts, which is convenient and quick to operate, safe and reliable. 6 The product adopts CVC8.0 dual-meter noise reduction, DSP software algorithm intelligent quadruple noise reduction, with 2IN1 soft and hard labels and double-mark noise reduction function, the noise reduction effect is more perfect, high-definition calls can be ensured when using at high speed, and the lines are adopted The streamlined design of fluid engineering greatly reduces the wind resistance and achieves the coexistence of appearance and strength. 7 The product adopts 800mAh super-capacity rechargeable polymer lithium battery, which can talk for up to 22 hours and stand by for 400 hours. It can be used and charged during riding to realize both charging and use. 8The product is equipped with soft and hard two-in-one earphones, Velcro bottom clips, front and back bottom clips, suitable for different types of helmets such as full helmets, half helmets, visor helmets, three-quarter helmets, off-road helmets, retro helmets, etc. Wide range of applications 9 The outer shell of the product is made of high polishing process, non-rubber oil treatment, internal silicone inlaid structure, so it can be deeply waterproof, light-resistant and durable 10 Support pairing with 99% other brand Bluetooth intercom headsets and ordinary Bluetooth headsets on the market, support K line, connect to ordinary intercom