Bluetooth Sleeping Headband

SPECIFICATIONS With Microphone: No Wireless Type: bluetooth Waterproof: No Volume Control: Yes Vocalism Principle: Dynamic Support Memory Card: No Support APP: No Style: Headphone Resistance: 32Ω Plug Type: Line Type Number Of Drivers: 2 Line Length: 0m Is wireless: Yes Impedance Range: up to 32 Ω Function: Common Headphone, For Mobile Phone, HiFi Headphone Frequency Response Range: 20 - 20000Hz Earcups Type: Sealed Control Button: No Communication: Wireless Charging Method: Cable Bluetooth Version: 5.0 Active Noise-Cancellation: No   Bluetooth technical parameters: Bluetooth version: 5.0 Bluetooth transmission distance: 10M Music playing time: Maximum sound 7h, medium volume 10 hours Microphone distance: 1m Bluetooth standby time: 72h Battery capacity: 150mA / h Battery power: 0.55w Horn impedance: 32 ohm Horn power: 0.02w Frequency range: 2.4-2.4835ghz Sensitivity: 45dB Transmitting power: 6dB Audio output distortion: 0.6% Audio output SNR: 93dB Charging time: 1-2 hours Maximum input