Specifications: The B35 BT helmet headset is designed to enhance riding safety and convenience with remote operation capabilities for mobile phone calls, stereo music playback, and FM radio. Equipped with an advanced CSR Bluetooth chipset and an integrated headphone amplifier, the B35 delivers clear audio performance for calls and music. Its compact, waterproof design makes it a reliable companion for riders. Item Name: BT Helmet Headset Material: ABS Bluetooth Chipset Version: 4.1+EDR CSR8635 Bluetooth Profile: A2DP, AVRCP Battery Capacity: 450mAh (included) Frequency: 2.4GHz Amplifier: HT4832SQ Charging Voltage: DC 5V Features: Waterproof, compact size, hands-free calling Dimensions: Length: 8.5cm / 3.35" (approx.) Width: 2cm / 0.79" (approx.) Height: 5cm / 1.97" (approx.) Notes: Due to variations in lighting and screen settings, the actual product color may differ slightly from images. Slight dimensional variations may occur due to manual measurement. Package Includes: 1 x Headset Host 1 x MIC and Trumpets 2 x Magic Tape for Helmet Installation 1 x Fixed Folder 1 x Screwdriver 2 x Screws 1 x Charging Cable 1 x User Manual