theBoom E Turbo Headset — single earphone

Same 25 g over-ear headset as theBoom E, with a microphone optimised for direct smartphone connection: it keeps rejecting noise where a phone's automatic gain control would otherwise pump up the ambient sound. iPhone, Android and Samsung via 2.5 mm / 3.5 mm adapters (not intended for landlines). 16 Ω driver with vinyl-tube waveguide, mono, 2,200 Ω, 50–20,000 Hz, S/N > 70 dB. Leatherette case and 2.5 mm adapter included.