Razer Hammerhead True Wireless TECH SPECS FREQUENCY RESPONSE 20 Hz - 20 KHz HEADPHONE IMPEDANCE 32 Ohm (1 kHz) HEADPHONE SENSITIVITY 91 ± 3 dB (1 kHz) HEADPHONE INPUT POWER 8 mW HEADPHONE DRIVERS 13 mm HEADPHONE CONNECTOR Bluetooth WEIGHT 45 g MICROPHONE SIGNAL-TO-NOISE RATIO ≥ 55 dB MICROPHONE SENSITIVITY 42 ± 3 dB (1 kHz) COMPATIBILITY Devices with Bluetooth connections Smartphone app available for Android™ 8.0 Oreo and iOS 11 (or higher)