Function: 1. 2. Strong compatibility: bluetooth controller is compatible with all smartphones, music apps, headphones (wired and wireless) and bluetooth speakers 3. 4. Weather resistant: this pilot for your smartphone is waterproof and durable enough to withstand snowy slopes, wet roads and wet bathrooms 5. 6. Handy: pilot bluetooth is adjustable, you can wear it on your wrist or you can use the sticker to stick it where you want, convenient and reliable Specification: Item Type: pilot Material: ABS Battery model: 402030 lithium-ion battery (built-in) with a capacity of 450 mAh Bluetooth version: V5.0 Remote control distance: approx. 10 m / 32,8 feet Characteristic: 1. Small and exquisite, easy to carry with you 3: it can be used for car music control, bicycle music control, motorcycle bike control, skiing. 4: IPX4 waterproof level List of packages: 1 x pilot for smartphone 1 x strap 1 x Velcro closure 1 USB cable 1 x Manual