Features: BT 5.0 chip provides more stable and faster connection, 10m transmission distance, low power consumption and low latency. The graphene diaphragm and 13mm moving coil unit make the sound smoother and richer, HiFi sound quality. The battery display shows the battery level of the charging case at a glance, no need to worry about power shortage. Ergonomic design, small and lightweight, fit the ear canal, not easy to drop, comfortable to wear. Adjustable anti-slip liquid silicone eco-friendly earhooks, anti-sweat and waterproof, more stable and comfortable to wear. Powerful transmission speed, you will not feel any delay even is you are playing games, bringing a more enjoyable gaming experience. Specification: Brand: Lenovo Model: LP7 Color: Black/White(optional) BT version: V5.0 Transmission distance: 10m(barrier-free) Music transfer method: A2DP Frequency range: 20Hz-20KHz Impedance: 3215% Speaker diameter: 13mm Transmission frequency: 2402-2480MHz Signal-to-noise ratio: >96db Sensitivity: 1073dB Battery capacity: 50mAh(headphone), 400mAh(charging case) Packing list: 1 * Pair of headphones 1 * Charging case 1 * Charging cable 2 * Pairs of earplugs 1 * User manual