[Transmission distance] Outdoor linear distance of 15 meters [Battery capacity] Pure cobalt battery Earphone 30mah
[Battery capacity of charging box] 400mah
[Speaker] 10mm True Copper Ring Speaker
[Listening time] 3.5 hours
[Talk time] About 4 hours
[Standby time] 120 hours
[Charging time] 50 minutes
[Working current] 5-10MA
[Working voltage] 3.0V-4.2V
[Distortion] Less than 0.1% [Signal to Noise Ratio]Greater than 90db
[Frequency Correspondence] 20-20KHZ
[Transmit Power] 4dbm
[Speaker Impedance] 32 Euros
[Carrier Frequency] 2.4GHZ
[Support Bluetooth protocol] SBC, AAC FHSS does not support APTX o encoding
[Charging compartment size] 6.0 * 1.7 * 4.2 cm
[Headphone size] 1.7 * 4.2 * 6.0mm
[Single weight] 135g
[Function] In-ear detection + single and double ear use + switch song + adjust volume + summon siri + pause / play + answer phone